I have had it with GarageBand. It's simple, works well enough for the caveman simplistic shit I do, but the newest version doesn't see any of my 3rd party plugins, and that really sucks, because, well I need them.
Is Reaper finally stable on OS X? I could go back to Logic Express, but I'd rather use Reaper, since I did quite dig it on Windoze.
Was helping out a buddy with it about 2 weeks ago. So I'm not exactly sure what build version he was on. But it seemed to be stable enough. Only thing though, was that he wasn't using anything resource-hungry or overly complicated with his plugins. So YMMV
Personally I haven't spent enough time with it. As work requirements dictate that my main axe is either Logic Pro or PT.