Zenfone 2 is great phone with great performance.i useded this phone for 1 year but there was not a single lag everything was fast and Smooth.In durability the phone is not good. Once my phone droped from only 2 ft and the display broken.sound of the phone is also not so loud while watching videos u have to keep ur hand closer to speaker.The zen ui is also good it receives regular update of zenui apps, wallpaper, themes.
The phone is good for multi tasking and heavy games.