I’ve got a Captivate as well, and I like it a lot. The GPS stinks (still waiting for the rumored firmware patch for this) and the battery life isn’t great (though that is to be expected with a device that does so much), and I could do without akl the AT&T bloatware that can’t be removed, but other than that I love it.
The display is excellent, the email, messaging, internet browsing, music player, and camera are all quite good, and there a lots of great free games and other apps in the Android Market. Oh yeah, and you can make phone calls with it too, I think. :-)