I find it very ergonomic, the matt coating is easy on the hand, the mouse is not too light which makes the easy handling.
The presence of buttons on the back side to the previous / next page is extremely convenient.
It may possibly be a little small for some hands, especially for men, but it has a very correct size for the hands of average size.
Matter of preference.
For that price, I am completely satisfied and pleasantly surprised. I ask no more than a mouse, it met all my requirements, I do not see why pay more unless possibly you want a mouse gamer, but for the average person who does not play intensively FPS, it's perfect.