I really saw a huge change in the tendinitis I have in my right hand. Whereas with a typical mouse I used to feel discomfort every day, now I have forgotten what it is, even though I use it for 8+ hours because of work.

Disappointing build quality experience.
In less than 6 months of daily use (mainly office), the rubber coating on the mouse scroll wheel started to peel off and wear in spots, resulting in scrolling no longer being smooth and precise – it slips, sticks, or does not respond properly.
It's a shame, because in all other aspects the mouse works flawlessly, but this problem with the wheel significantly reduces its comfort and reliability. I expected more durability from the materials, especially in a product of this price category.
I do not recommend it if you are looking for long-term use without maintenance. I would prefer a model without a rubber coating on the wheel to avoid similar problems in the future.
(Rating: 2/5 stars – only for the initial performance)

Quite comfortable to hold, although it's not suitable for small hands.
Its build quality is okay. It doesn't feel very sturdy, but neither does it feel "cheap."

You immediately notice the difference from a regular mouse. Extremely ergonomic - I bought it after developing tendonitis in my wrist.

I had CTS and couldn't make a fist with my hand due to excessive mouse use. A friend of mine recommended it to me and my hand has improved. The syndrome was eliminated after a month.

Quality, beautiful, good texture of the plastic, convenient, the wheel is a bit hard when you press it, ergonomic, it takes a little getting used to, but it doesn't have RGB and the indicator LED doesn't have the ability for on/off.

It faded after 3 days of use. I do not recommend it.

The device is decent, at a reasonable price. However, it does feel small in my hand. It also feels somewhat slippery; a different external coating would be more appropriate.

Unfortunately, it didn't work for me. I have relatively small hands (about 9x14cm, to give you an idea so you don't make the same mistake as I did) and the buttons are too high for my hand, resulting in my hand being in the air when I use it, which ultimately causes me more pain, and much faster than a regular mouse. It has 3 extra buttons, but you can't customize their function, making them somewhat useless. Another problem is its weight; I expected it to be much lighter. Nevertheless, the tilt is very convenient! Regular mice feel uncomfortable after using this one

very helpful for those who have problems with tendonitis from many hours on the computer. The angle it has is one of the best I have tried and it fits me well.

good for the price. In the three years, the scroll wheel broke, as happens to me with most cheap mice. So I keep in mind that I will renew every 2nd-3rd year

I have been using it for over 6 months for work and I am fully satisfied. It's impressive how much it relieves the wrist and forearm.
It is for medium to small-sized palms, so for me, I would like it to be a bit bigger, but I am still satisfied.
Excellent value for money and I am waiting to see how long it will last.

UPDATE 26/09:
The wheel is not working well for me. The outer rubber casing has come off and it doesn't turn sometimes. It can be fixed with super glue at least.
For €20 for such a mouse, you expect lower quality.

The other buttons work normally.

It seems to be of high quality, the response is impeccable and the adjustable dpi with the button on top helps a lot. The vertical position takes time to get used to, especially with the pressure on the buttons, but when you work with it for a few days you will see that it is very convenient. Time will tell how quality and accurate it will remain, but so far 5 stars.

First time I used an ergonomic mouse and I got used to it easily. I have been using it for 2 months and so far it is durable and user-friendly.

I have a history of Carpal tunnel and tendonitis and various RSIs, this mouse made a difference immediately. I had never tried it before and I was afraid but now I don't go back to traditional mice! There is still tendonitis pain when I work for more than 8 hours but it is bearable, however, the wrist is much better and the hand position feels much more natural and comfortable.
Attention if you have small hands, this may be a problem, I have medium-sized hands and it worked for me.

Very good and mainly durable mouse. I have dropped it 500 times and I will drop it another 500 times, so far it hasn't suffered anything. Well done

A cheap plastic construction with limited lifespan.
If it was cheaper, it might have been worth it.
For me, who wants something of higher quality, it was simply a waste of money.

Expensive but it helped with the pain I had in my wrist...also takes 2 to 3 days to get used to it!!!!

I bought the mouse for its ergonomics due to thumb pain. It helped me, I must say.
It functions like a regular mouse and has no issues, so there isn't much to comment on.
I would recommend it for purchase!

UPDATE 23/03/2023
Unfortunately, the scroll wheel broke after 5 months!

Apart from the fact that the keys are not silent (which is understandable for its price), it is otherwise simply excellent. I did not expect it, but now I no longer have problems with the tendonitis that I used to have very often, and in general, I do not feel fatigue in my hand. I use it for 9-10 hours daily in design programs. A very good purchase!

Quite comfortable and lightweight. After a day or two, you get used to it. Only the wheel I would say is in a strange position and makes it difficult to use.

I still feel pain in my hand even from this mouse, but it may be because I have very small hands. I still use it as my main mouse. (sorry for my poor Greek, I am using translation)

My wrist stopped hurting. It just requires attention in the movement of the hand from the keyboard to the mouse... I have dropped it on the floor twice but it held up

If you suffer from Carpal Tunnel Syndrome, do not hesitate to buy this mouse because you simply won't see any difference

First time buying an ergonomic one. It is very comfortable and lightweight. I definitely recommend it. Quick response. For someone who has never worked with an ergonomic one and is considering it, it is indeed very comfortable in office conditions.

I've had them for 3 years now, and I have only one thing to say - black dog.
I've lost count of how many times it has fallen down, and it still works without any problem.
Many complain that the buttons are noisy, but personally I have no issue.
My hand has stopped hurting since I got it, so I would buy it again without a second thought.

For its price, it is quite satisfactory. The only thing that bothers me a lot is that at regular intervals a continuous sound is heard from the mouse and it stops responding.

We bought 2 pieces, and in both pieces after 1 year of use, the wheel has broken and is not functioning properly.

Well, a brief review,
First of all, I have to say that I have been using it for 4+ months for 8+ hours a day due to work.

Positives
-Lightweight mouse
-Light click

Negatives
-(for my hand) relatively small space for the placement of the middle and small finger to the point of hindering movement
-Average click sound
-Relatively better than a regular mouse in terms of pressure on the wrist

Neutral
-LED light around the thumb position

In summary, I bought the mouse for its ergonomic design, but I can't say that I am completely satisfied, but for the 23€ I bought it for, I believe it is worth it.

It looks good, lightweight, clear click, good hand position, reasonable noise. The problem with what I bought is that it has a tragically small range. The USB dongle under the desk and the mouse have interruptions in movement, if you don't cover it with your hand, the mouse stops working. It was tested in different spaces and different PCs with the same result. I will return it as defective, I hope not everything is like this...

After five months of using it, it works very well. It is lightweight and many times you need to move it with control because you don't forget it.