Yeah, it's not too bad.
My biggest gripe right now is, not surprisingly, the accelerated open source drivers for my video card. To be fair, they did a phoenominal job with it, and it's probably the most comprehensive driver for AMD cards available (apparently, AMD lent them a very big hand with it), but it's pretty sluggish with some tasks. I'm not sure whether this is due to X overhead or the driver having to use software fallbacks (it could very well be the later; X is pretty fucking awful for general desktop use), but it winds up utilizing a great deal of CPU -- an entire thread in some case! That's not even for updating the full screen, either. In some cases it does that because of a single window being open.
I haven't tried using ATI's drivers -- fglrx -- but in my experience they're nowhere near as stable as the Xorg ones, even if they do perform very well. I think, for now, I'm going to take stability over performance. This is easily one of the most stable Linux systems I've had in years. I was even able to suspend to RAM and wake the system up multiple times without the thing freezing, or the feature just refusing to work.
