Love the text messaging feature. It keeps me in contact with many people, all at once, in an easy manner. Love that I can have 20 different text messaging conversations at the same time and it keeps me in close contact with everyone without having to dial a number.
I've been using the iPod while working out. (As pictured.) It's excellent. And I find that the volume for the iPod goes louder than it does on my actual iPod. It's super easy to navigate.
The camera is great. I've taken lots of good shots. Not the highest of resolution but on the phone they look great.
I have found the battery to be comprable to my previous cell phone. It lasts about two days even with a high volume of use.
The only downfall I have encountered is that I cannot receive picture text messages from others. Only via email.