I bought this phone back in 2015 and was very much satisfied with the phone. the first phone to be launched with 4gb RAM and its performance was great. the camera quality is fine and has a special feature called zen gesture which allows users to access into apps easily before even unlocking the phone. unlike all other smart phones this one comes up with many build in software and apps some of them are very helpful and some are not. the reason i’m saying not a great choice to buy is that ever since zenfone 2 has released they haven’t introduced any software update and it is still the 1st version of the lollipop still running. no updates are coming from the asus and the processors are also very much outdated which gives a tough time to use and operate the mobile. however the issue I mentioned above started only when andriod’s new operating system Nougat was launched till then it was fine and then all went bad and my mobile was having deep trouble. so my overall opinion is whomever already bought nothing can be done but do buy hereafter because this particular phone is outdated.