The general consensus seems to be much more positive than when X1 was released and YMMV. In my case, X1 PE (build 535) is so stable for the use I make of it, that I'm not considering moving to X2 for now. But that's my personal choice and certainly does not mean that I don't trust X2..., if anyone wonders.
And the same goes for Windows 8. I'm very satisfied with Win 7 Pro (x64), that their's really no incentive for me to make the move.