That's shortest review I have ever read. :P
My brother is using this phone from about 2 months, and he faced a microphone problem in 2 weeks of purchase. And there's only one service center in city which can repair micromax androids, and I don't I need to tell that its pathetic. However, the phone fixed itself surprisingly. Quite good phone for its price, purchase if you are ready to deal with the service center guys any time.
Gravity has resistive touch screen, whereas canvas has a capacitive.