In general, the mouse is an exact copy of the legendary Sensei, the differences are small in design - this is actually the design of the scroller, a black case with a cut-out logo for illumination and a sensor edging. If not for the quality of workmanship, it would be an ideal replacement for the old version of Sensei. But, unfortunately, poor quality has not bypassed this mouse either. My copy suffered from quite significant flaws in order to return it back to the store. The mouse was bought for work. The first thing I didnโt like right away was a very hard click, it was hard to press after the old sensei, but you can get used to it. The second, the saddest thing, the surface of the mouse was uneven, and it is not clear for what reasons, perhaps these are uneven legs of the mouse, perhaps something else, but the mouse rolled on the left side when the left button was pressed, and since the mouse click was hard, it turned out like this that when pressed, the cursor moved, and it was wildly infuriating. Third, it's a terribly squeaky, rattling scroller. When scrolling down, everything is more or less nothing, but when scrolling up, the scroller made some kind of knock. It turned out that the movement of the wheel left / right is quite free, which led to displacement and impact. If anyone is interested, the Sensei Ten does not have the exactlift parameter in the mouse settings, perhaps this is due to the new sensor. The sensor itself is good here, but the resolution is excessive. The backlight brightness cannot be adjusted. I had high hopes for this mouse, since sensei is the most comfortable rodent for me, but unfortunately, due to unacceptable quality, I had to return it to the store. Perhaps I got a marriage, and not everything is so bad with this model, but there is no way to be sure of the opposite. I'm sitting on an old Sensei.