I'll reply to this, not as an AC, and not as an MS Shill. In fact, I've had this Slashdot account for years.
I recently switched to a Windows Phone (Lumia 920) from the iPhone 5 through that promotion that Nokia is running for trade ins. Yes, I voluntarily funneled out $450 for a Lumia 920 (of which I'll get $360 back when I send 'em my iPhone 5)
Anyways...
Overall, I've been happy with the phone. It works reasonably well. And while the lack of apps can be a problem, it hasn't detracted from the functionality of the phone itself. The best I can say is 'different'.
I also like the live tiles over notification center...