I purchased this product about 2 years back and I have had zero issues with this phone. I have used the phone day in day out.
The battery is good enough to last a whole day, screen resolution is perfect, the size & shape of the phone is very good as it fits well in your hands and the best part is that you get very cheap covers, including S-View covers that not only protect your phone from dust and sweat, but also shows important notifications & even lets you pick calls without actually opening the cover.
I am very satisfied with this phone. Recently, after using the phone for 2 years, the battery started to give up. But instead of buying a new phone, I opeted to buy a new battery from Samsung service center for Rs. 900 and the phone is again as good as new.