I took it for work mainly, because it is clearly lighter than the Rival 500, there is no extra weight from the cable and other husks, after a long day of working on the video, you can safely turn on the same rainbow and distribute it there without any strain in your hand, fits perfectly under a large palm, you only need to get used to it, and it's a very pleasant mouse. For a year of use, the gum has not been erased, the main thing is not to peel with your nails there, and nothing will tear, the gum is soft, it can start to shine, wipe it with alcohol and it is matte again. The right rubber pad peeled off a little, I decided to tear it off completely, because it interfered, put it on rubber glue, the problem was fixed once and for all, maybe this is a marriage, maybe not, but I didn’t find better mice for my hand, double click and others there are no cons, according to the battery, at the end of the working day, put it on charge, by the morning you have a mouse ready for battle, with full backlight, 12 hours is enough, without backlight it lives for a week without any problems (the trick is that the battery is there small, for ease) The advantage is that it is just like the 500th in length, it is very convenient to switch back and forth. This mouse is taken by those who are in the know and understand why they need such a product, and cons can be found everywhere and always.