I love it.
I wish I had one to use and play with, OS X would satisfy my need to tinker with linux and it would provide with me a nice usable system everyday with minimal hoops to jump through.
Wish I had one but can't afford it, especially as a "tinker machine" . I built my current system for about $1000 (not including monitor) and it was fairly high end when I built it and it does everything I need it to do. Plus I can still fire up the games I like when school work gets to me.
G5 is very tempting and I hope it does well for Apple. I've been pulling for Apple to do well, fuck, I think I still own some Apple stock even.