My view:
Good use as cellphone, but not as main music player. Makes me happy since I have my iPod for that. I simply take iTunes as a nice extra feature. I hate flip-open cellphones so that's a plus here, too.
PROS:
Nice design, good screen visibility even under direct sunlight, easy to use, good customizability (7 easy shortcut keys on main screen), iTunes is a nice feature
CONS:
Charge/sync cable loses contact extremely easily, transfer speed (iTunes, etc.) very slow, iTunes is limited to 100 songs, iTunes interface is pretty slow and even worse while a song is playing, camera resolution could be more, no Bluetooth for iTunes synchronization, battery indicator inaccurate, 2.5 mm audio jack instead of 3.5 (standard)