This Phone is Simply Awesome.If you are looking to buy phone under 16k this is perfect phone.
I am also use J7 old edition.
icomparing to the J7 6 to old J7 it has minor changes but powerful changes i.e Battery, Processor, Ram, Marshmallow(OS), Metalic Design except these changes remain all are same. Some of the pitfalls still came with J7 6 from old J7
those are
PROS:
1) Display is pretty good with vibrant colors.
2) Touch is smooth and responsive.
3) Build quality is good and look.
4) Camera quality is simply Brilliant(Both front and rear)
5) Battery backup is goodas you expect from 3300maH battery. old J7 3000MHA
6)No lag or hanging problem as of now and you shounld not expect hanging problem with 2GB of RAM and 1.60 ghz Octacore processor.
OLD J7 1.5Ram And 1.50z octacore processor
7) remove battery phone is Slim and very Light Weight.
8) Front Flash
9) OTG support.
10)Fast Charging.
CONS:
1) No backlit on buttons.
2) No Gorilla Glass(Tempered glass may be applied to solve this issue)
3) Speaker sound is little less as compared to other phones at this price