I'm happy so far. I know that getting a system this early will have growing pains and lack many of the games I like the most.... Bethesda, Bioware and NHL.
Biggest disappointment is the lack of demos. I think the only demos are: FIFA, NBA Live, KI, Zoo Tycoon, Xbox Fitness. Maybe I'm missing one or two, but that's pretty much it. No Ryse, no ACIV, no Forza 5, no DR3 etc.... 2k didn't even bother with NBA 2k14.
The same thing happened with 360 the last year or two.... demos thinning out. It seemed in the first 5-6 years just about every game had a demo. Add in demos and trial limits for XBLA/indie games and it's great to let gamers feel out a game before purchase.