I have been using Samsung Galaxy J7 since the month of December in 2015 and haven’t come across any major setbacks yet. The battery is quite sustaining even on regular usage of internet( mostly WiFi) . It works for an average of 8-9 hours with a 100% charged battery. The rear camera is great for clicking quality pictures, during both, day and night.
The secondary camera, as well, is good enough for clicking your everyday selfies. The resolution of the phone’s display is spot-on and has a beautiful, sleek body which looks exceptionally luxurious. This phone is a great deal in the section of an 11K buy. Overall, I would give this phone a 7/10 for it’s value of money and all mentioned specifications.
P.S. On a frequent use of Snapchat, as I shuttle constantly between the primary and secondary cameras, my rear camera would tend to freeze. It wouldn’t allow me to use my front camera. The solution to this was restarting my phone and it continued working just fine.
I hope you find my opinion of assistance: )