I'm always happy.
Anyway, for me X2 is good and better than X1.
Performance is more gapless.
No crashes yet. But I did not spend a lot of time with X2. I do more work in Reason nowadays.

I am still testing features. Had a few crashes with 306, but nothing yet with 308 Quickfix.

Looks pretty good to me, the CPU core spread is much smoother. In X1 Core 1 always seemed very high, now its rather even.

I'll say one thing: compared to the X1 rollout, X2 has been rock-solid from Day 1.  
 
The minor problem with the ProChannel GUIs disappearing was taken care of by the Quick Fix.  No other issues here. 
 
Amazing what a few billion binary digits, arranged in a particular order, can do.  :-)
 
Cheers,
Eddie

Smooth as silk here!

+1 on the happy side of things.

I am by NO means doing anything complex, but the mostly midi recording I have done so far has been quite free from trauma.

Bob Bone

 I'm quite pleased so far, but I'm still learning some of the features. Many little things have changed, but as I'm slowly understanding the changes I'm quite impressed.

Pretty happy here.  
 
For me, there's no comparison between: A) X2's feature set vs. X1, and B) X2's initial stability vs. X1.   And X2 has only had one quick fix.   I can't wait to see how the first "real" update goes...
 

WAY better than X1.

Working well here. A few wtf moments when the hand goes into autopilot and selects a quick key that has changed - though these are imo a lot more logical now. 

Lots of small improved features that add up to a lot. Main likes PRV, auto zoom, aim assist, automation lanes, smart tool, PC additions.

Still not got my head round comping on multiple tracks eg drums.

working great for me except for minor glitches