A friend of mine just bought this piece of crap. As he brought I said oh let me take a look at it. And as expected the phone was a really a typical samsung slow kinda phone. As I opened that 5 MP camera on that back, photo taken from that were worse that my smartphones front cam. The 480P display was accelerating lagginess of the device. The touch was shitty not as much as cheap chinese phones but yeah I am comparing from them so you guys can understand it.
The worst thing about samsung is there UI "Touchwiz". Making things more worse and slower since samsung came to smartphone market. I mean touchwiz can even cause s5 to hang what is Grand Quattro compared to that. The more you use the phone the worse the optimization gets. Same story for every samsung smartphone.
After sometimes phone started causing some other problems and my friend got repaired it and sold it.
P.S: You can say I am a samsung hater. There mid-range smartphones really sucks. High are although good.