I voted adequate - I like the build quality, the heft, the balance, and the touch capability. I dislike how it only operates in 1 band that is currently overcrowded and prone to severe interferences from the devices that run right next to it, and I'm not particularly fond of the ergonomics (gesture controls for me really offsets this.) Overall, I think it is much nicer than most other OEM mice, and it is disproportionately nicer than Apple keyboards. It can also be improved in the next generation.