Summary: It's a perfectly functional 10-key addition to a laptop. I would suggest Velcro strips on the bottom if you're going to use it for extended periods, as it's about the same weight as a CD case. Also, the retractable cord dealybob sort of works...sort of.
Summary: Well designed product. One of the few numeric keypads that works plug and play on a Mac. My accountant wife felt the key placement was slightly out - not quite consistent with traditional accounting calculator. She is now used to it after using it for a few days.
Summary: Neat idea and OK if you are a ''hunt & peck'' keyboarder. As a touch-typist however it will drive a user nuts as the unit is built so lightly that it hops around your desk as you are using it. It desperately needs something to fasten it down (Suction cups? Velcro?). If you've got a lot of data entry to do it's far faster to plug in a full USB keyboard rather than this device.