I am using this phone from the past one and a half year, and no issue I found till now, everything runs perfect in this handset, picture clarity is unbelievable, video clarity is awesome, you can compare its camera quality to an iphone , everything works fine, like the processor you can run more than 15apps at the same time with no lags in it.
Talking about the ram , 2gb is more than enough, my frnds are using MI series handsets and are like I am having 3gb of ram better processor etc but when it comes to comparison you’ll find nexus better , its 2gb ram can beat any 3gb ram without any common issues faced by the users like over heating.
Talking about the material , it is really very very light weight, and very cool and slim and easily fits in pocket. Music clarity is nice.
If you are traveling you will love the music clarity. Battery backup is good , 24 hours of standby and 7 hours of internet usage I am getting so I am happy with it and the most promising feature of this phone is its regular updates, so you dont have to wait for the next update , its nexus guys I am talking about I got its lollypop update so early as compared to other brands like galaxy series .
Over all you can rely on this phone with no doubts in mind. Its far far better than any of the high end phone of its category