I have one. I have had one since it was released and it is becoming better with each update. The main problem with browser IMO is that is has issues with displaying flash content, but from what I have been reading it may be fixed soon.
The edge network is kinda slow, but I try to stay on WI-FI networks. On a WI-FI is blazing, but does drain the battery a little faster.
I do not have any major problems with it and Apple has been quick to fix issues and add functionality fairly often. A major software update was just released and added a lot of cool new features.

John - R-7577