I bought the Icon a month (or two?) ago coming from my third Android phone...
I was definitely apprehensive about the lack of good apps, but I figured I could deal with it to have my phone, PC, laptop, and Surface all be much more in sync...
That said, I really do like the OS... it's fast and responsive, and I'm one of the few who seems to like live tiles too...
I like that pictures taken with the phone automatically are accessible from my other devices too...
Other than that, I really wish I had not switched...
I miss the message-waiting indicator light, but the lack of quality apps is just killing me...
The camera is pretty great in certain situations... while I'm not really trying to use my phone as a camera replacement, the zoom on this camera is not as good as on the last Android I had)
The facebook app is terrible compared to the one for Android (so many missing features...)
I would rather use Chrome but can't...
The Amazon Kindle app is also missing lots of features...
There is no Amazon Cloud Player app (and the browser doesn't appear to support Flash, so I can't get to my music library)
Tether-X is a very poor substitute for PDANet...
The snapchat alert doesn't really work...
I cannot connect to my Onkyo receiver over the Network (it will play via Bluetooth, but I can't get to my music library, so it doesn't matter)
The ParkMobile app is basically featureless (used to pay for parking at muliple meters and lots where I live)
One of the reasons I wanted to go WP was to have everything sync... most apps I have tried do not (e.g. MS Solitaire, MS Minesweeper, GameSoft World at Arms...)
Of course, my primary issues are with the lack of apps and/or lack of functionality for apps... so not really the phone's fault. But I've been trying to cruise through these boards for a few days to learn a little bit more, and it sounds like most people just don't care... At this point, I'm thinking it was a mistake to switch. The faster and more responsive OS is nice, but it doesn't do me much good when I can't really do anything with it