I've had mine for a week or two now. Some things I've noticed. Using some form of a case fixes the antenna problem no problems.
Pro's
- The display is very sharp and easy on the eyes.
- The cam is really good with the auto focus and touch focus in both cam re record mode
- Folders are a huge help
- multi tasking is nice but I rarely use it.
- Separate volume buttons are really nice to have
- Noise canceling mic is a great plus for phone calls
- Smooth flat back makes it easier to hold and set down
- iBooks; online ebooks now on your phone
Con's
- Will shoot in 720p HD but wont upload to Youtube from the phone in HD (major screw up by Apple in my mind)
- Accessories are few and far between
- Some apps have yet to release new api's for the iOS 4.0 so there are some holes there.
- Smooth back means that you have to be careful picking it up. Your fingers don't just slide under it
- There are some Java holes in the new iOS 4.0 as well
- iBooks while a good idea is better suited for the iPad altogether.
- Multi tasking; you need to go in and close them from time to time they never close. Hasn't caused any problems yet..but something to keep in mind
Over all it's a good phone great proven platform and since you're an iTunes junkie like me you'll be fine.