In the begining asus zenfone was really nice to use. But after few months the problems with the product came to know. The battery was the biggest issue. 2 times charging is must for a average phone user. Its operatong system and design were awfull. But the performance after few months retarded quickly. Even it has gorilla glass it is easy to break its display. Laghing will be a serious issue after 1 and half years of use.