Apparently not for everyone's hand ...

My rating is 3 star, and I would rather tend to 2. But as a mouse and its feeling happens to be also highly dependent on the user, there are yet become 3.

Previously I had a Anywhere MX is clearly filling in my case in hand, although it is slightly smaller. The RAT M always slip something in my hand, which leads to a certain inaccuracy and entsprecheden incorrect clicks.

The other buttons are all easily accessible and I really like.

At the processing there is nothing to complain about.
The material is processed properly and give a certain "hydric" impression.

The alternatives are either Bluetooth and an enclosed dongle ready.
Last results for me on Windows 8 problems, so that the mouse is not always recognized after starting the laptop.
Since I have this problem but not further investigated, nor am sure if there is not at the computer, I do not review it.

The drivers are ok. But for my taste a little playful because the audience here quite clear that should be "gamers", the different DPI settings, etc., are probably sinniger for other people than for myself;)

Conclusion:
When the mouse would be better in my hand, I would keep it. Although it is very expensive for my taste but the extra buttons and positioning / access like it very much.