Droid X (Verizon). First touch screen smart phone (had a Treo forever ago) so not a good person to ask for comparisons. But so far it's been good.

The Google integration is very useful as a google user. Well, I don't really use gmail but I have an account and did a sync with that. Very easy to update contacts etc.

Nav feature is nice. Actually use it in the car. Now I want Aux Input for the head unit so I can play tunes off the Droid. We didn't have a GPS system at all so it's nice to have one.

Flashlight app is useful. Stopwatch app for things like bike races and timing sit ups.