HAVIT HV-MS764 RGBバックライト付き有線人間工学的垂直マウス

A definite improvement over the much more expensive Logitech MX Master 3 which I found to be nowhere near vertical enough for my requirements.
The havit HV-MS764 is well designed, comfortable, and comes with a nice long cord. The scroll wheel could be better (the aforementioned logitech mouse has an excellent scroll wheel) and I find the position of the DPI button to be a bit daft, I tend to knock it on the keyboard.
I have no idea why Havit appear to have discontinued this mouse, let alone appear to have decided to not even replace it o.O

I got one of these back in September and absolutely love it. Goodbye RSI.

From the moment I started moving it around on the desk I was impressed. I didn’t think that an upright mouse was going to be that great, but this is fantastic. After a few minutes and moving back to my regular ergonomic Logitech mouse, I found the change in wrist position felt very unnatural. Six months on and I haven't gone back to my old mouse, and I haven't had any strain in my wrist.

If you're in any doubts about buying this, don't be.