I am using this device for about 6 months, it dosent lag at all. Its battery performance is out of the world, You wont get better battery life better than this in any of the smartphone in the price segment.its camera is decent, it struggles a little bit in low lighting conditions but in daylight its excellent.according to me it is having best finger print sensor in any other phone under 10, 000.Its little bit slippery so u have to be careful about the phone. I would recommend you to buy a back cover as soon as you buy the phone. Overall Its an amazing phone which hardly have any diadvantage.