Short and sweet. . Windows Phone 8.1 for Denim - including UpdateTest photos the camera (as of January 2015)

positive:
+ Camera: shutter speed, white balance, depth of field, macro, zoom quality, 20 Mexpaixel, 6 lenses Carl Zeiss optics See the pictures I've uploaded here + display: sharp and vibrant color
+ Video in 4K resolution (optional)
+ Windows Phone 8.1: very smooth, no stuttering, so far no crashes / freezes / unwanted reboots
+ Amazingly fast Internet Explorer ('m actually Google Chrome - fan)
+ Rapid transfer of data between PC and phone
+ Equalizer: all Windows sounds values ​​adjusted globally.
+ Design: Square, edged, valuable thanks to aluminum frame
+ Wireless charging / Qi - function: only Lumia devices, as well as a few LGs and because new Nexus 6 Iphone - users look there quite envious. Qi - charging stations have been around from 10. You want to miss it any more. No annoying cabling every day.
+ Free Windows Phone voraussichtl 10 update. 2015

negative:
- Camera has weaknesses (noise) at night images without a flash. Are quality is still better than most other smartphones, but worse than, say, LG Nexus 5 (even tested), one probably future updates eliminate the problem
- Apps are mostly still in beta, or only in old versions with fewer functions available (recordable Facebook, Whatsapp)
- Some apps are completely absent or are only as inferior unofficial version (Chrome, Google Maps, Youtube, actually all Google Apps, Tinder, etc.) -> The App Store but is growing steadily

Personal. Conclusion
After five Android phones I have not regretted the move to Windows Phone with the Lumia 930. Full recommendation