Im using j7 from last 10 months.
it good smartphone for daily usage and also good for gaming.my gaming experience is good with j7 I played nova 3, modern combot 5 and asphalt airborn 8.it is has only 1.5 gb ram but also it loads the apps fast.its camera is good and littel slow in focusing and it has selfie flash which is use full while taking selfies in low light.
it has extra features like ultra data saving mode, s bike mode, one hand mode dual 4g support.
one of the major con with j7 is its low sound.it has too low ringing sound I missed lot of calls due to its low sound.