Came to X2a after using Sonar Producer 8.3 for years. 8.3 was rock solid and very responsive. X2a seems a bit sluggish. I've also had a few crashes. Not a lot but, more crashes with X2a so far than I had with 8.3 over the several years I used it.
Disappointed in the inability to change colors as completely as in 8.3.
The lack of dedicated icon buttons for "fit Project To Window", "save" Save As", etc. really bugs me. Sure, I'll learn to use the keyboard shortcuts but, I don't like it and don't like that I'm not offered the option to work like I have for years.
Having said all that, I'm overall fairly happy with X2a and HOPE they keep improving it and at least give us a free update or two of "fixes".
BTW
i5 processor, 8 gigs RAM, Dedicated audio drive, Windows 7