[CyberMonkey]

My 2 cents:
I have owned WinMo phones and now currently own an iPhone.
WHich do I like better? I actually like them the same, love them both. There are things about each that are better than the other.
WinMo: easier to customize out of the box.
iPhone: Need to jailbreak it to get any decent customization, but once it's jailbroken.
WinMo: Still need a stylus for alot of navigation of the device.
iPhone: all finger friendly
WinMo: Not many updates put out my Microsoft.
iPhone: contanst updates put out by Apple
WinMo: sometimes it's difficult to find a certain application.
iPhone: basically all apps housed at the app store.

What it comes down to is that both OSes are great (specially with some personalized tweaking), but each one will be for some people and not for others. What people are comfortable with and like, that's what they should use.