Well, it's my first smartphone too.
Screen looks great, it's easy to use, calls are clear, camera is reasonably good, it's nice and small and light, build quality is good.
Possible cons (pretty minor as far as I'm concerned):
- you can't install Flash
- some video files won't play - e.g. some of the mp4s from the TED podcast don't play correctly
- as you're essentially moving from a phone to a computer it does take a day or two to get used to all the options and the concepts behind how the user interface works
- you'll need to buy a charger cable for every power socket you're likely to find yourself near - smartphones drink juice big time
- unlike my old C902 it doesn't have silver and black stripes along the edges, so the Wildfire S no longer matches my favourite cufflinks
I don't regret buying it at all. Prices seem to be dropping now so shop around