Exactly, there is quite a bit of variability among the MIS fellowship programs. The great majority of programs that you'll find on the MIS fellowship council website are relatively new and have been in existence for less than 3 years. As a result, it's difficult to get a good feel from these programs, even after interviewing. Most programs provide a fair amount of bariatric experience, but the amount of foregut, hernia, colorectal, HPB, etc. can vary. Other variables include actual operative experience, call schedule (practice and ER), resident involvement (usually better without residents), salary, and academics. It's also important to seek out a fellowship director who will really go to bat for you in finding a job afterwards.