Well, my first impressions are not so good. I've been using the iPhone for a few years, and the inconsistency on this phone just baffles me. The first thing I wanted to do was unlock the phone. I couldn't even figure that out, until I saw the sales guy slide his finger over the green button on the screen. There was absolutely no visual cue of how that worked. Then as I started browsing through the pages of icons, it really reminded me of the smartphones I tried before the iPhone was around: inconsistent and clumsy.
I'm not even going to discuss features, because to me they really don't matter as much as the user experience. Bottom line, the user experience has to be good, and Apple has nailed that down. I could go on, but I found a good article that pretty much sums it all up.