(This is probably the most appropriate thread for this, I don't think I need to start a new one).
The tipping point for me came three weeks ago when I made this forum post:
http://forum.cakewalk.com/Strange-linked-clips-behaviour-m2852454.aspx ...and also submitted a corresponding bug report to Cakewalk. No response to either. This particular bug, along with intermittent loop-timing issues and poor handling of notes which are orphaned when splitting clips (read: 'crazy behaviour') make using the application an exercise in teeth-grinding futility for me. I'm tired of spending over an hour just trying to manipulate a single bar of music satisfactorily and giving up in frustration as a result.
So for the past couple of weeks I've been using FL Studio and have been having...fun. Yes, fun. It's made me realise that I haven't actually had fun with a piece of music software since Cubase 2 on the Atari STFM. I certainly don't regret buying Sonar or supporting Cakewalk; at the very least I still get to use the fantastic set of synths and effects that ship with it.
If Cakewalk produce an X2b bug fix patch, which I hope they do, I'll certainly take a look. I also hope that they decide to include functionality which really should be bog-standard in their flagship product; mp3 export comes to mind, for example. However, if their next offering is a paid-for upgrade, I don't think I'll be tempted.