I have used a bunch of the Autogear parts, except the new case. I have swapped a few M-20 internals with complete Autogear M22 kits. Never an issue with the kits or individual parts. The guy I get my parts from never had anything bad to say about them and he is a very straight shooter..
If you are going to pro-shift it and install it behind a 1000 hp big tire car, you are going to break it. If you are installing it behind a 500 hp street tire car it will be fine.
I am actually going to build a Pro-shifted version with the new case for my own personal race car to see how hard I can push it. I can build one for 1/5 of the cost of a Jerico. I want see how long it holds me over till I save the money to buy a Jerico.