In direct comparison with the HTC One M8 I can not detect any differences in display quality, color, sharpness, brightness, contrast actually. When displays are in my opinion absolutely top and beautiful light.
The overall performance is right. Nothing jerky, or takes when opening large memorial breaks. Everything is going beautifully afloat.
The front camera makes in bright light very nice neutral color and relatively sharp images, depending on what you have done in the Image Adjustment. In dark or weaker light conditions because it begins but already relatively strongly to rustle on. The automatic white balance of the front camera should be absolutely off times and corrected to check with interior lighting, because that is often too warm / reddish set.
The main camera has with the white balance on the other hand no problems in the dim light and often works exactly.
Although both cameras be nearly identical, the main camera is still in almost all areas a bit better in their results which the sharpness, contrast, color reproduction, etc. concerns as the front camera.
A pity, I find that you can not apply it to the photo video effects, because they are not so bad.
Also this phone has stereo speakers up and down, but they are almost not seen, and have been incorporated very discreetly. Again, the sound pretty strong and loud and every time is better than the other smartphone competitors.
During a telephone conversation the interlocutors on mobile side are very good and clear to understand, though sometimes with a slight noise in the background but does not bother. If one calls to landlines at the quality is again better not beep, rushes and everything is clearly understood.
In normal use, such as 20-30 WhatsApp messages, automatic e-mail synchronization, about 1 hour long phone calls and listening to music in between something you get on a single charge loosely through the day, or even two days. Depending on how and what you have used and set everything. Even longer holds the battery in the switched power saving mode, which can be adapted very well to their own needs.
All in all I would recommend this device any further need of a good camera Smartphone in a stylish design with excellent call quality, brisk pace and great display.