1: Not suitable for the Claw Grip
As I embrace my mouse with the Claw grip, have the edges of the mouse to the points where the finger contact have to be smooth. That's when this mouse on the right side is not the case, the transition between the upper shell and the lower part is very high. Even if you flat on the mouse sets (palm grip) hand can feel this transition and there is somehow no point at which one can position the little finger comfortably.
2: Position the mouse wheel
The mouse wheel is too far for my taste above. On my old MX518 the wheel is below the top joint of the middle finger when the hand is flat. In this mouse the fingertip of the middle finger is on the bike. When scrolling I always feel so, "stretch" the finger to have.
3: Volume
Clicking either mouse button is loud. In a quiet setting very disturbing.
The remaining quality is clear, the surface is very pleasant and the plasticizer odor is only to be heard when you hold your nose directly to the mouse. The pressure points of the buttons are a bit spongy but I was to cope.
Mir is now clear that you simply get for this price no mouse, which should be 4+ hours in use daily.