The mouse is as quiet as advertised. Unfortunately, it does not respond well to hand movement. It is bad when used on a mousepad and terrible on other surfaces (e.g. desk). For a 15 euro mouse, it is unacceptable and a shame that I chose this over other cheaper ones from well-known brands.

The positives of this mouse are that it is indeed quiet, has a matte texture, and its weight is satisfactory.
The problem with this mouse is that after a few seconds it becomes inactive and you have to move it a little to "wake it up". It probably goes into power save mode, but it is annoying because I haven't found a way yet to change this inactivity every few seconds.