Im using it for more than 9 months . I purchased it from amazon when it was launched for ₹12500 . overall perfomance and buildup quality is good but one thing you will not like in it is camera rest everything is great in k4 note . some features that I liked are :
one year warrenty of battry ( others gives it only for 6 months ) , speakrs are very effetive when you watch movies etc. , battry backup and fast charging are amazing . .If you are looking for perfomance based phone then you can go with it .