The Weather App was a nice surprise.
Current weather/week -> Hourly -> Radar. Big, pretty, and it's super fast. That's exactly what i want from a weather app.
The XBox One Music app is very nice... but what's with having to pay a monthly fee on mobile devices, even if you're only using local music files?
Local music shouldn't cost you anything, it is when you turn on Cloud Sync that you start Streaming Cloud versions of your songs that you are limited to 10 hours a month or pay for unlimited.