I agree, shape is the most important as long as sensor is decent. My school has a few WMOs lying around, but they have low glitch out speed (after which there's negative accel) so I actually can't play at my sensitivity with them. But the shape is a bit too big for me (perfect for palm grip, but I use fingertip). I really wish there was a small, lightweight (<80g) mouse with a perfect sensor like in G502 or something.