I've only had my OnePlus 3T for a few weeks, but i continue to be impressed by the speed of everything. The fingerprint scanner is especially fast and accurate, and the U.I is the most lag free of any android phone I've ever owned. If you want the smoothest UI experience on Android, this is the phone to get.
Camera quality is great, and although it may not stand up to some to a few of 2016's flagship smartphones (Galaxy S7, Pixel Phone, iPhone 7), especially in low lighting, it is perfectly adequate in good lighting conditions. Detail is impressive and a manual mode is offered.
The 5.5" 1080p OLED display, which is adequately bright for outdoor viewing, however, It may not be as bright as the iPhone 7 or Galaxy S7 displays. Colors are vibrant, saturated, and a bit cold out of the box, but can easily be calibrated to sRGB mode, which produces more accurate colors.
The single bottom speaker is crisp and loud, however, the quietest setting is a bit too loud for me, sometimes i wish i could adjust the volume further
Battery life is also adequate. it easily gets me through a full day with moderate usage, and Dash Charge will charge the Oneplus 3T insanely quick.
All in all, I believe this is the best smartphone for the price currently on the market. It may not be as good in some areas as the best 2016 flagships, but at 30,000₹, I can't complain at all. There really aren't very many shortcomings to this phone. in day to day use, I could not be happier with my OnePlus 3T