Been on two training programs, envoy a few years back EMB145 and recently at Endeavor.
I think they were both very good and most of the instructors were good. I was a little bit more concerned at envoy cause it was a couple of "paper tigger" sessions with an instructor and 8 or 9 sim sessions (cant remember) and then a checkride. I think their limit was that you couldnt repeat more than 2 sessions. And for some reason I always had the feeling that my job was threatened. Of course that never changed not even after flying the line.
Then at Endeavor it was 5 FTD sessions (not paper stuff but actual interactive touch screens), 10 full motion sim sessions and then an AQP checkride (slightly easier than a full normal checkride, but same stress level). So I actually felt more prepared for my checkride (16 sessions total at endeavor vs 10 at envoy). I think they can give you like 4 or 5 extra sessions or even more if you are always showing progress and good attitude ( there is no specific number of extra sessions). However the stressful part for me was ground training because if you fail 2 written tests you are out. And some of those tests have very tricky questions.
So overall I think Endeavor was a better experience And YES its a good question I dont understand why so many people got irritated, you wanna know about QOL, PAY and ALSO training so what the hell is wrong with that? Geez...