UPDATE 24/08/13
After half a year I use values down the phone on 4 stars.
Main reason for this are regular micro lags (ie it depends sometimes for fractions of a second) and
the (eg compared to the HTC One or Galaxy S4) rather weak battery life (using as normal
Users through the day comes)!
On my Youtube channel MrHelferSyndrom you can find a detailed Kaufberatug to the 3 mentioned phones, the video is:
Buyer's Guide Galaxy S4 or HTC One, or Sony Xperia Z
