Unfortunately, the price seems a bit high, if one disregards the fact that, compared with other radio or Bluetooth mice indoors infected significantly more technology (touch scroll).
My interest in design and unusual forms and the mouse at Amazon needed to get 27, led to the order and finally to the very positive surprise.
Only the lack of a (definable as a double) middle mouse button performs the music notation program "Finale" in setting slurs to double click forefinger Training orgies ;-) Therefore, deducting half a star.
Another half star deduction for not quite accurate flatness on hard, smooth surfaces, resulting in a slight wobble when you click and maybe that caused the mouse hand again came on the market. This small error can be solved by doing this by subtracting the base on a fine polish sandpaper (400 grit) on a glass plate. But that's already hard towards mice milking ...