Bought this phone about a month ago and this is my opinion after using it after one month.
About hardware:
The outer case is premium in feel and touch. The display ratio to body is perfect. Display is pretty vivid and touch is super responsive. The device feels sturdy enough to handle small and medium impacts. The side buttons are easy to operate and does not feel too soft or too notchy either.
Camera:
Camera is definitely a good one. There are lot of options in Pro mode just like we get in DSLR. You can set everything custom as per your requirement like focus, aperture, ISO, shutter soeed etc which will results in very customisable photos.
Sound and Microphone:
Sound at loudspeakers are perfect and audible even in crowded places. Earpiece for calling fullfills the expectatios. But unfortunately One Plus is not providing an ear phone.
Battery backup:
I simply love the dash charging technology of this device. It charges upto 40 percent of battery just in 10 minutes. Overall battery backuo is upto the mark.
Overall performance:
Yes. This device does heats up a bit when you play any high end games for approx 30 minutes which is very natural as you are using all it' s components at extereme levels for better gaming experience. But again, even the battery performance is suoerb for gaming too.
FINAL verdict:
I would definitely recommend this device because even other high end Android devices does not come up with such configuration at this price tag. Snapdragon 845 with 640 GPU packed with 6/8 GB RAM is an astonishing combination in this price.