This is advertised as a black mouse, but all of them are silver. It works well enough, but it doesn't really have 4 configurable buttons as advertised. The front / back buttons on the right are linked to the same function as those on the left.
I don’t know if I just need to get used to it, but I think there is a small delay. But I decently love it being wireless & it’s also asymmetrical so you can use the mouse on both sides.