"What's not to like?"4.0 starson by wronghead
Pros: Large, beautiful screen
Snappy and responsive
TouchWiz is simple and works well
Has physical buttons
8mp camera works wonderfully
Cons: Yes, the battery lasts all day. That being said, it's a near thing. The battery life is my only major complaint, but from my understanding it's pretty good comparatively.
500mb of ram is a little light with how cheap memory is now-a-days.
Summary: This seems like a pretty solid choice if you are planning on jumping on the 4G bandwagon early. Apparently the Thunderbolt's battery is a deal breaker. This phone will last all day, which is nice, but it's still a little light in the battery department for my tastes.
Performance wise, it does freeze up for a few seconds from time-to-time, but otherwise it's pretty smooth and the phone usually responds instantly. I was eyeballing the Galaxy S2, but honestly, I think it's too much phone for what I'm going to need. The Charge is enough. Still, an extra 500mb of memory would not have gone amiss. I am a little worried about how the phone will perform with newer and more resource intensive applications, but for the time being the 512mb it comes with seem to be holding up well.
I like TouchWiz so far and don't see any reason to try to get rid of it. It's pretty simple and unobtrusive.
I have a few minor gripes with the phone, but otherwise I'm pleased. The little bastard was hellaciously expensive, but... I think it will be worth it in the end. At the very least, it aught to keep people happy for two years, which is all one can really hope to expect from a phone these days.