I really liked Mirrorshades, if for no other reason that it showcased a variety of styles. It's been a while since I read it but I recall thinking it pretty good. It might have been what got me to read Rudy Rucker's stuff.

You can read all of Rucker's short stories (which I find to be better than his novels) here:

http://www.rudyrucker.com/transrealbooks/completestories/