i have used this product for a week now, and it works with almost all the big games like nfs most wanted , gta san andreas, for some games though like san andreas you have to turn the controls from keyboard and mouse to joystick to easily change the button setting but in rest of the games it does all that automatically. you just have to plug your usb and everything is done.
i thought that it was cheapest on flipkart so it may have any cons. but until now this works perfectly. the grip is good, however i do find that the buttons are not centered according to their positions but it doesn't matter. it's far better thana keyboard and does not pain your fingers.