in the end
With a mouse at 35 euros I didn't expect the best mouse in the world either, but compared to my wireless office mouse (m600 which is going on its 10th year) in terms of weight and materials or even design, I really feel like I'm getting a mouse at 20 euros max, the only difference is the battery instead of the batteries.
I hope that this will be an unfounded doubt, we'll see with use
I've been using it for a month now, and the battery is not as strong as the batteries. I regularly have right clicks that turn into "previous page" and clicks that don't go through ... I don't recommend it at all for gaming or daily use, but only for troubleshooting