I have been using this phone from 3month no issues yet. one of the best smart phone in the range that too samsung.
once hold for battery for 100 percent then it can give you a backup for 23+ on a constant use.
means while the best smartphone
SM-J7( 6)
but if you had more expensive S series the you may find the camera not so great.
otherwise, battery, processor and usage is very good.