Why didn't Nintendo release the Wii with this level of sensitivity in the WiiMote?!
This device makes gameplay so much better than before. It's a little disappointing that you require it to play some games (hence the purchase) but to be honest it's such an improvement over the old controls. There are still a few "low speed" sensitivity issues, such as putting in golf, but across the range this device makes the Wiimote 100% better.
Admittedly this item is pretty pricey (as there is NO Wiimote, just the addon) but that's to be expected from officially released items on any console.