I'm not sure if the first reviewer on the list has used the Move because he reports issues with playing it sitting down and in the dark.
I have played Shoot and Heavy Rain sitting down in the dark, on a projector screen with no problems. In fact, because of the light on the Move, it works even better in the dark, bright light is what Move doesn't like so much.
The Move has so many advantages over the other types of controller and can be used in true games like shoot-em-ups as well as the Party type games that the others are aimed at.
Get it (if you can find one in stock!)