A mouse that can drive you CRAZY. Not in a good way. The batteries didn't close properly, I had to put a PIECE OF PAPER to make them make contact. At first, it had a strong PLASTIC SMELL (and this is not the first device I buy, I know what I'm saying). The buttons took 2-3 days to start working properly. But the highlight of its glory is the accuracy and stability of the laser: the mouse MOVES on its own on the screen, you shake it and it moves wherever and however it wants, you can't make it focus on black, white, yellow, or red. BETTER STICK TO THE OLD ONES WITH THE BALL. It's a shame for the purchase, but at least I vented my frustration by BREAKING IT. DO NOT BUY IT. If you are a store, WITHDRAW IT.

It broke on the first day of use

I have it only for a few days, but for its price, I can say that it is very good. It is 100% wireless and the only negative thing I can find is that it operates with batteries and does not have its own rechargeable one. Other than that, it does everything it promises and much more. It has a very good grip and the sensor works perfectly on a smooth surface. However, I wouldn't use it for gaming (it has very good energy saving)

If you have small hands, this is not for you. I had to struggle to click the left button with my index finger, and the button itself was hard to press. It becomes tiring in this way. Also, because it is somewhat tall, it may not be comfortable for someone who frequently switches between mouse and keyboard, as they have to lift their hand a little every time they let go of the mouse (which again can be tiring)

First ergonomic mouse. Better than conventional ones. But I would prefer if there was an additional button on the left side and if it had the function of the left click with a thumb press.

Extremely hard clicking, especially on the left button, combined with its very low weight is a bad combination. Very difficult to handle. The mouse simply slips everywhere and you struggle to press the hard keys. Additionally, it is dimensionally suitable ONLY for very large palms with long fingers.
Beautiful and ergonomic design, but as soon as you start using it, you realize that it won't be convenient.

I bought 3 pieces and within a few months, 2 of them are garbage!
The left click double-clicks (even reducing the speed of the double click),
the scroll jumps and the cursor moves whenever it wants!

I bought the MUS-ERGO-01 and it impressed me so much that I also bought its wireless sibling. For its price, it is very good to the point that I didn't expect it, but it is definitely quite bulky, yet incredibly comfortable. 5*+

A classic case of you get what you pay for. Despite being large in size, its weight is small, resulting in not being able to control the mouse properly and accurately. The motion sensor is unacceptable as it requires a mousepad and does not work on any other surface. As for its ergonomics, it is unacceptable. The click with the index finger is quite hard, causing the mouse to move with every double click. Personally, I achieve a successful double click only 1 out of 3 times. The height of the buttons and the curve that touches the hand are wrong, causing fatigue in the hand in order to keep it in a position where all the buttons can be used. Finally, I would like to note that its wireless range is very small compared to all the other wireless mice I have.

The mouse is for large palms. Its length does not suit all hands. Also, the left click is too high. It forces the wrist into an upright and tiring position. I know these because I still own an ergonomic mouse with a shorter length and its main buttons are located lower. It seems that ergonomic products need to be tested before purchase.