I almost feel like, with the investment they are making in this, it has to be good. Don't get me wrong, sometimes studios throw money away without any kind of quality check, but this is the most expensive TV show in history by quite a bit. It would be economic malfeasance to not have the right people in place to ensure it's good.
I could be horribly wrong, but I think Amazon has too much to lose, literally, to roll out crap in this case.