J7 2016 is an upgrade to the previous counterpart. Talking about design, the design feels boring and feels cheap in hand. J7 consists 720p amoled display which is pretty bad at this price point.the phone comes with android marshmallow and going to the Samsung's history, they are careless in providing latest android versions. Coming to the performance and battery life, j7 performs average and is not for gamers or using too many apps. Battery life is excellent and you'll not regret about it for sure. Camera is average for the price point. If you only want Samsung phone then go for it otherwise skip it.
