This phone is one of the most appealing and powerful budget phone to have come out in the market in 2015. I am using the phone for a 6 months now, and fully satisfied and happy with the performance and the optimum usability of this phone at the price point.
The stock OS is buttery smooth to operate running latest Android 5(lollipop), with 4 GB RAM providing powerful performance and usability to run apps and play games without a lag in conjunction with the powerful processor it has, the storage is awesomely huge with 64 GB internal with expandable slot too till 32 GB making it a powerhouse store room.
The only bloating point is the battery back up and the camera quality which can be manageable though the heating issue subsides with subsequent updates in firmware. The patented quick charger from ASUS makes it really fast a process of charging the phone, but the battery doesn’t withstand even 11 hours of single use. In all, with due respect to the company, they have come up with a very good performer and the smart phone worthy of being kept for ages.