Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
1) This thing eats batteries (AA). Get a good set of rechargeables.
2) It is very needy. You can't just let it play for an hour, and shut it down for a week. You must pat it on the head frequently, and play music every day to keep it happy. It is like a real dog that needs to be fed & walked daily, in that regard.
Other than that, it is really cute and fun. The chicks really dig it too :)