Samsung Galaxy j2 is one of the greatest phone with in its price range.i have been using this from last 6 month and I m very statisfied with it.
Samsung Galaxy j2 has killer look specially gold one, at first look its look like a premium phone.
it has 4.7 inch super AMOLED touch screen with is very good but you cant compare it with gorrila glas.
5mp Back and 2 mp front is good for normal use and specially video chat.
Bettary backup is very nice, after more than 6 month I dont feel any problem with it, it also has ultra saving mode feature which is amazing.
I think processor is bit slow which is single negetive point of this phone.
UI is very familier, it come with latest android version and will get updated with new thing.
so overall I recomend you this is a great phone with its price range.