I have the handshoe mouse. It's definitely not for claw/fingertip grip; 100% palm grip. I'm not sure if you can adjust any sensor settings either. Furthermore, its build quality is inappropriate considering the price. Oh and it doesn't have the two extra buttons, only basic three (there's a separate button for middle click, which is awesome, if you ask me). Neat shape though and you can pick size/orientation (I have a left-handed version).
I can recommend Contour Perfit mouse instead. It's pretty wide and slightly angled too, as well as available in multiple sizes/orientations. Much better quality, though; there are proper three buttons on top, a thumb wheel and a thumb tilt-operated back/forward button; and it's usable with claw/fingertip grip, but you might need some forearm/wrist support then.