All apps run smoothly. The quad-core is noticeable.
Now we come to the time really "negative" ... The battery life ... I still have another China-Phone from the house Simvalley. The thing also has a quad-core, 1.3 GHz and the identical screen resolution. While the N8000 (if there such a thing is), stops operating after about 3/4 day, has China made by Pearl despite lower battery (2400 mAh) is still 60% of its load. Of course, the brightness is set to Auto on and off the GPS and BT. It only runs G3 and WiFi.
China Phone's just getting a little lottery ... But, otherwise you would have the 3- or 4-fold to spend Euros ...
All in all - I'm not unhappy