My consensus is its awesome! X2 's workflow is vastly improved , editing , arranging , time line enhancements , smart grid ,Prv view, the addition of rmix, and the console emulators are just to name a few things I love. Also the search feature in the browser is great. Right clicking on a sample in the browser now gives you options. Also I love the auto zoom feature. Just wish lanes exploded as large as tracks do. All in all there's so many neat usable features I'm still finding.:)
As far as stability , I had a few crashes but , we figured it out , it was the concrete limiter , so I just don't use that, I also had crashes were clicking back and fourth between tracks and buses , I am also experiencing that some key binding don't work . Such as snap on and off, snap to measure,and a bunch others.
Other than that x2 is very stable, and freaking fun to use!