The screen is very good, very good definition (easy reading web pages) satisfactory brightness and contrast.
The sound in the headphones is excellent, but you have a decent headset, not the hands-free kit comes with that is just good to avoid fried brains.
Responsiveness is also excellent, though I do not play so much on intensive games, I do not know too much. For information, Farmville turns carefree ...
The EMUI interface is shimmering and reactive and email app is very responsive.
The format is a little big, but we ended up doing it. Battery level, I want three days use phone / mail / sms / few web without activating the ultra-eco mode and turning off the evening. Doing lapping the battery!