I can't speak to top surgery at UM - though I have a few friends who went through UMHS for surgery and their results look good. They both did DI, I don't know anything about peri results.
I'm a UM grad student and just started hormones through the UM Comprehensive Gender Services Program (CGSP). I was pretty wary when starting, since I'd heard it was pretty gatekeeper-y, but they just revamped the way the program is set up last year and it's much more streamlined.
I had to do 4, one hour long therapy sessions before getting referred for hormones. Then my therapist presented me to the Program board and I got approved for T. Within 2 days of my approval, my therapist emailed me 3 doctors who I could contact to get started with hormones. There are more than 3 doctors in the area, of course, but they like to spread people out so you don't have a huge wait. It only took me 2.5 months to get an appointment (compared to the usual 6 month wait most endos have) and my doctor prescribed me T and gave me my first shot at that appointment.
They do want you to do a year of RLE, which starts from your first appointment, before you can get top surgery. My therapist is going to write me my first top surgery letter and have another therapist in the program write the second. It's all pretty streamlined, and I've had a GREAT experience with the program.
Feel free to PM me if you want to chat about the program. And if you do end up going through the program and have any issues, let me know. I work at the UM Spectrum Center and can make sure any issues you have get reported to the right people.