Just had this phone to gift my brother. This comes at a lesser price tag. Till now have not faced any such performance related issues. Personally have experience of playing on the phone.
The nano-coating works wonders. Just the camera is below par. But lets face it. for 14k you can not expect everything in place with best performance.
The camera is not bad at all. Yeah some problems you can notice during low-light imaging. Rest all features are upto the mark or I can say better than most of the competitors, upto 19k price range. Great phone to have. I would strongly recommend this, in android category, and also compared to windows/lumia counterparts. Its way better than the alternatives available, as a whole package. Must Buy in this price range.