The side-mounted "back and forth keys" are completely misplaced, because the "back button" is very often pressed accidentally. The "Vortaste" is pressed with a little practice with the ring finger of his right hand - a bit cumbersome.
Furthermore nervous mouse noises:
The keys sound loud and like 10 years ago on a mouse. The wheel appears inside to grind.
Positive note is the design, color and especially the precision laser.
Despite this positive gist of a mouse, I'll probably fall back on the Logitech LX7, which I had previously. This has given me much better liked, especially in terms of forward and back buttons, which are attached to the top and do not make a forward and backward-Hüpfpartie navigating the Internet.