The iPhone itself is a great device either in capabilities and aestetichally.
What I do not like about the iPhone is the company behind it.

Almost all of the features will be crippled. No free VoIP over HSDPA. No way to use it as a bluetooth modem. Probably new apps only thru the App Store (i.e. either you or the developer has to pay). If I am a developer I have to pay 99$ to develop for it (and test it on a real hardware).
Don't want to think about the AGPS functionalities. The first AGPS device I owned that had AGPS was the Moto A925 and the AGPS was limited to signed Java applications (i.e. pay).

I don't know why I want one, then!