The more I use the more I like it. I was a bit hesitant initially as a price is quite high but now I think it was a good choice.

What I like in it especially in random order:

1. Ability to connect to a local WiFi network - this is really great. Not only saves you money (my mobile plan includes unlimited internet access anyway) but also speeds things up incredibly and allows you to test services on your phone in save environment.
2. Great alarm clock. Feature I have been especially missing for years - ability to set alarm clock for selected days of the week. I had had it once in very old phone 7 years ago but then I couldn't find it in any other mobile after that.
3. Charging the mobile batery from USB port. Really nice, less cables on the desk.
4. 8GB - it is quite a lot, for now.
5. Builtin camera, 2MPix, suprisingly good and sharp images even in poor light. I mean good and sharp comparing it to other handhelds with builtin 2M camera.

What I dislike in the device:

1. The most annoying thing is that I can not connect from my laptop to the internet using the moible as a modem. I guess that was forced by the mobile provider signing contract with Apple.
2. Lack of any games on the device.
3. Unability to upload own applications on to iPhone.

I guess that's enough for a day of use.