Wanted to share my thoughts as well since there was so little recent information. I think in general that there are no bad joints programs and that almost all places would train you well otherwise they wouldn't have a fellowship! Saying whats is the ideal fellowship depends so much on what the individual applicant is looking for - complexity/revisions, volume, anterior, outpatient, robotics, research, mentorship, name etc. That said, I do think there are some names that most people would agree are the most prestigious few and they have probably remained pretty consistent over the years
In my opinion and in alphabetical (e.g. no particular) order: HSS, Mayo, OrthoCarolina, Rothman/Jefferson
Some other highly regarded places this year (places I interviewed at or heard about, again in alphabetical order): Anderson Clinic, Brigham and Women's, Cleveland Clinic, Duke, Hoag, Rocky Mountain, Rush, Utah, Wash U
Personal and brief opinions on a few of them. Note that specific info on rotations, approaches, salaries etc can all be found on interview day so I'll keep it brief. I think this reinforces that there are a lot of terrific programs out there, including many I didn't get to see
Anderson Clinic: historically a big player in the recon world with the Engh family. Still an outstanding fellowship, though I don't think its on the same level as some of the other premiere places listed above. Hamilton would be a great mentor and I got a very collegial and positive vibe from here. Strong volume (650 cases), very strong anterior and uni experience and great autonomy from what I see on interview day (we went into the OR). Less revisions than some other places. Less academic than some other places but you would walk out on an outstanding surgeon ready for private practice and well regarded with this name. I was very impressed with the grads from here that I worked with.
Baptist: another program that was historically a big player in joints, but I think this one has slipped a little bit from the glory days of Scott. Similar to Anderson with high volume (800+ cases), strong anterior experience, and private practice style. Big focus on efficiency and I got the sense that autonomy is somewhat variable but still fellows were comfortable and walked out happy. Wined and dined prior to interview here. Of note, revisions here have improved significantly with bringing in Smith from BU/Tufts. Overall would be a great fellowship.
Brigham: historically an upper tier program that I think is now knocking on the door of the other premiere programs. Estok has been FD for some time and is dedicated to training fellows. Iorio is now at the helm of division chief with a lot of new hires including Chen from Rothman. Seems like all aspects of joints covered: revisions, all approaches including about 60% anterior, solid volume for a university and solid autonomy according to their fellows. Strong research and academics with Chen, Iorio. Also can't forget the Harvard name! Overall, a place that offers an extremely well rounded joints experience.
Cleveland Clinic: another fantastic fellowship that is knocking on the door of top tier places. Huge emphasis on fellow autonomy and case complexity with a strong revision experience. The faculty seemed like great guys and their pre-interview dinner really sold the program. The FD Krebs also sold the robotics experience here as well, and Kamath does hip preservation for some but not excessive exposure. Really seems like all aspects of adult reconstruction are covered. My concern was that there seemed to be less anterior than some other places but overall thought this was an incredible place.
HSS: one of the premiere places historically and still today in my opinion. Seems like some of the old guard is gone but Bostrom and Su are dedicated to creating an excellent fellow experience here. Lots of perks to be being at HSS including affordable housing and comfortable and well compensated call. Strong case numbers with appropriately varying autonomy between the faculty. Seems like all aspects of recon are covered, though I think less anterior than some other places. Big emphasis on robotics where it seems these guys are at the forefront. Awesome preinterview dinner. The caveat is that there are a lot attendings that train fellows (~20). Just fine for me, but some folks may prefer to work with a smaller group more frequently. Issues with schedules being set by residents rather than fellows seem to have been resolved. Overall, an elite fellowship that would prepare you very well. Can't go wrong here.
Mayo: another one of the premiere joints meccas. Many faculty who have authored your textbooks (Berry, Trousdale, Lewallen, Sierra, Pagnano, Taunton) and educated you on how to manage revisions and periprosthetic fxs. Rochester MN is what it is and was an experience to see for the first time. For a year anything seems doable but everyone has different life priorities. In terms of training, covers any and all aspects of recon including approaches. Unlike the HSS/Rush/Rothmans of the world, there is less an emphasis on volume but on complexity and quality of cases. Case number was around 350 which was lower than most, but the spectrum of revisions and hip preservation was at the top. Fellows seemed happy with a huge emphasis on didactics and teaching. Some concerns about "PGY6" with floor responsibilities and volume persist. Overall, a premiere fellowship that covers everything.
Mass Gen: historically MGH was one of the names in arthroplasty though I think with some deficits in modern day arthroplasty. Interview day was a little bit disorganized and one of the fellows seemed disgruntled, which may have affected some peoples' perception. Harvard name and solid training is there but concerns about volume, autonomy, and amount of scut work. There also are deficiencies with no real anterior experience. Overall, would be a good year but I think it is not quite what it was in the past and wasn't so popular on the trail this year.
Rothman/Jefferson: one of the premiere recon fellowships and joints meccas that offers the complete package for fellowship training. Privademics to its core. Huge names in the joints world. Covers all exposures (anterior, AL, DL, posterior) and all implant types. Great fellow autonomy where you are really expected to operate from day one. Work hard program surgically, but minimal scut with an army of ancillary staff for clinic. Strong revision experience with some of their new hires. 600 cases, 25% revision. Busy schedule daily with early morning ORs ending in the early afternoon. Strong didactics and journal club. Of course research apparatus here is a well-oiled machine and impactful with guys like Parvizi and Austin. Fellows go into both academics and private practice with great connections all over the country from here and extremely well prepared both in terms of academic prowess and in how to run a business. Very nice and fun dinner at Austin's house after the interview. Overall, seemed to be an outstanding fellowship choice and again you'd be lucky to match here
Rocky Mountain: a hidden gem of a fellowship here. Not the name recognition that Mayo/HSS/Rothman have but still well regarded in the joints world and among applicants over the years. Run like a true private practice with minimal scut work for the fellow. Dennis and Jennings would be incredible mentors and truly dedicate themselves to their fellows. No residents. All approaches, unis, and revisions abound. stronger research infrastructure and expectations than I would have thought coming in. Overall a strong private practice fellowship without the traditional big name but would be a great choice.
Rush: another big name privademic place. We did not visit Rush as interviews were all online due to COVID19. I agree with the sentiments previously described: great didactics, big name, and a well run practice. I do think Rush joints has slipped just a bit from the top tier ranks but that's just my opinion. This is definitely a premiere place but some deficits with lack of exposure to anterior hips and questionable autonomy with some of the faculty. Della Valle would be an amazing mentor but it seemed like some others may view fellows as more of a cog in the wheel. Gerlinger, the program director, seemed like an all around great guy. Strong revision experience among the privademic places. Again, they did an excellent job and presented the program very well as best they could but I feel like it was hard to dispel some of the rumblings from recent fellows. Chicago would be a great place to live for the year and overall a very strong fellowship that would take you far.
Stanford: in the past was considered one of the best joints spots on the West coast, though I think some other places have leap-frogged (see below). Overall, my sentiments are similar to MGH on this one: all posterior, relatively lower volume, and university pace in exchange for a big household name. Goodman seems like a great guy and Huddleston and Maloney are heavy hitters in the joints world but autonomy does seem to be questionable. The VA seems to be the gem here where fellows eventually get autonomy and attending level privileges for cases but only about half the year. Approximately 300 cases, 20% revisions. Overall, would be a solid fellowship.
Utah: another hidden gem of a program that has come to prominence among applicants on the trail (but not on this forum yet). An outstanding program with Peters at the helm. Strong anterior exposure and a huge catchment area for revisions makes this arguably the best West coast (though a little far from the ocean) program. Autonomy is outstanding at the VA where the fellows function independently in arthroplasty. Approximately 500 cases, 35% revisions. One things they seemed to address on interview day is resident overlap, as the attending to fellow ratio is 5:3. According to them it has been balanced, though it seems like talking to one fellow that there is some concern at the university hospital. Not a big problem, but something to be aware of I think. Overall, an outstanding program knocking on the door of the other elite spots.
Did not interview at but wish I did: OrthoCarolina, Hoag, SJRI, Duke