It is a good mid range smartphone.
The thing first of all I would like to say if u r going to buy such a phone better u buy j7 prime because it is 1000-1500 rs more but gives more functions than on8 such as fingerprint sensor and more internal space, better ram management, better battery backup and many more.
But u r here to know about on8 so it is also a good phone one friend of mine is using it and facing not much problem in it .One thing to be kept in mind the Black colour variant is much better good looking and stylish feel is there so I would suggest u to buy such a model.
Else everything u know about the model . It is value for money product but if u invest some more money u can get a better phone and will we go with the advance tech fashion.