Samsung always gives us new innovations, compact specs in their Phones but one thing is always been messy about them and that is They are overpriced all the time!
And This One Is No Different!
Galaxy J1 Ace contains 4.3 Inch WVGA Super AMOLED Screen(Really Awesome Cause SuperAmoled is by far the best display in the business).
It comes with dual core 1.3 Ghz(In my opinion Considering it's price i.e. 6000K; it could have been a little bit better!)
It contains 512 MB Ram and 4 GB of Inbuilt Storage that is easily expendable upto 128 GB(Even Here, They could have provided much more "Healthier" Specs!)
Though It's camera is a bit low in this range of price(Rear one is 5 MP and the Front One is 2 MP) but it's okay as long as you don't expect photographic Shots from it!
Now Let's come to the battery section; with 1800 mAh it's just ok.easily can go A day with basic regular uses. But I'm afraid, too much usage will be harmful for the battery.
In the end I would say, In this price range lots of other "Better" phones are available; so don't need to go for it but if you rely on samsung from your heart or don't have any other options to go for just for the sake of budget then you can give it a try. But don't expect performance according to it's cost!
As Always Samsung Mobiles are OVERPRICED!