Now I have the HTC One M8 and am totally satisfied.
The battery lasts well (the Lumia I could watch as the battery drained when I was only WLAN running throughout the day and it was very very warm during charging)
I have a really good call quality,
the applications run smoothly,
the camera is not sooo bad as it is often times,
the service is pleasant - I really have only one time tap to open an application,
the display is pleasant
and I think it's great that you can expand the memory.
The headset has a really good quality and I have never experienced that a silicone shell was just there. So also the TOP.
I hope that the smartphone by holding long long.