I moved from my iPhone (which finally bit the dust) to the LG Quantum. The nice things:<p>- Zune Pass. It's like Netflix for music, but you can carry your queue around with you even if you're off-signal.<p>- I stayed with AT&T, and have significantly fewer dropped calls and better signal quality than on my last phone.<p>- A single start screen with all the apps, auto-updating so you can see weather and other info without having to launch the app is really fantastic.<p>- No iTunes. The phone can just sync over WiFi, and there's no weird tethering-to-one-machine garbage.<p>- The keyboard! It's got two modifier keys (shift and FN), and the keys are large enough that I can type pretty quickly. I need to port a mini-emacs and a terminal window ASAP. It's that usable.<p>The not-good:<p>- The App Market really isn't there. And where there are similar apps, the ports smell of outsourced development, as many of them (Yelp and Kindle, I'm looking at you!) crash and/or just don't have a very smooth feel.<p>- Location services seems to have a lot of trouble figuring out where I am to anything smaller than a zip code.<p>- I'm not on Facebook or XBox Live, so I feel like some of the social integration is a bunch of work they did that I just miss out on. Fortunately, I could just remove those apps from the front screen.<p>- Trying to browse the Metro UI media app is a real pain. If I'm listening to a song, do I use the back button or swipe in a direction? Well, it depends on how I <i>got</i> to the Now Playing screen, and there are a few cases where I've been just stuck and had to close and re-open the app so that navigation would reset and I could get back to a artists list.