+ Interface (live tiles showing next appointment, alarm time etc)
+ Built in software (eg QR code reader, Facebook, Twitter, LinkedIn built in without installing any apps)
+ Xbox Live support for games
+ Office Mobile with syncing to SkyDrive and documents can be edited using desktop office apps
+ Nokia hardware
+ Nokia drive (free turn by turn navigation app)
+ Smoothness
+ Every phone is required to have a hardware camera shutter button
+ Camera can be launched when phone is locked by holding down that button
+ Integration with Zune desktop application (way, way better than iTunes)
+ Zune pass
+ Official connector software available for Mac
- Still lacking many apps
- Apps that are available tend to be more expensive than iOS or Android
- Some apps are really slow (eg Facebook)
- Multitasking does not really work properly
- IE9 is better than the old version, but still makes a few rendering errors, particularly on text headers
- No central place for notifications
- No support for displays greater than 800x480
- Phones can have software carrier branded and this causes delays in the delivery of updates