First of all I want to say that I have the phone since 9:12.
After an intensive use (whole time writing, game download, etc.) The battery has a full day survived (6 clock to 22:30) and had 6%. If the cell phone reaches 15%, the energy saving mode is switched on.
The camera's top. Each front and back camera. In dim the phone still takes excellent pictures.
The sound of the voice is perfectly clear (my opinion) and the volume (even for people who do not hear so well) is suitable.
I come from the Samsung Galaxy Note. 2
For me, the settings and the handling to only were a bit strange, after a short while you get used to but it.
Positive was also that you could transfer all the data from the old phone to HTC, in which the desired app to load the App Store.
The housing feels very high quality and is also good in the hand (despite small hands).
I hope this review helps some more indecisive.
Best wishes and have fun with your phone :)