Actually, it's nice.. Rated 5 out of 5 stars
I personally like it. Especially the more "sketchy" look (the outlines seem to be drawn rather than just generated). It integrates well with the popular "area o4.2" win xp visual style (orange substyle). I even have done some CSS modifications for a more interesting look and integration.
I hope this theme will finally be updated to be compatible with Firefox 3.5. I am really keeping myself from upgrading FF because of it :D