I would not recommend the Mamba, I've owned one before.
My problem with it was the plate/panel/whatever you want to call it, that connected the finger pieces to the switch was not very good. Unlike other Razer mice, it's just a piece of plastic that has two tabs that hit the click switches, which goes on top of the rest of the mouse assembly (which has another layer of plastic).
https://i.imgur.com/2DEnvhF.jpg (picture of what I mean)
Other mice have two part assembly where the top part snaps into the bottom part and they're more directly connected, making them a better construct.
The problem with the Mamba is that plastic top piece. Depending on where you press down on the mouse buttons, you can push the button all the way down, and sometimes it won't even make contact with the switch on the inside. (which means the actual click does not occur). I would call the Mamba a terrible mouse since it's not reliable.
Of course this is my personal experience and sample size = 1, but it looks to be a design flaw rather than a single incident. Mine is also an older version (2014? still has the laser sensor), so it could have been fixed in the later model, but that would be extremely hard to tell without having one to take apart, lol.