As we know Samsung is a good brand , but now a days there product is not popular due to less specification and poor quality of products.
Samsung Galaxy J2 Ace comes with 5 inch TFT display which is quite good but its not full HD.
1.4GHz quad processor which is good but only 1.5 GB Ram is present which is really less and only 8 GB internal storage which is bad thats why I really not recommended this type of products.
8MP camera and 5MP front is nice but in low lights quality is poor and main thing battery backup is also poor.so dont go for this product.