I saw a few YouTube reviews that liked this mouse. The adjustable nature of the main mouse angle and thumb groove appeal to me. It makes it into any other ergonomic mouse and it's supremely comfortable. I like that you get it and can just plug it to charge it and it works like a regular wired mouse and then once it's charged, you use it wireless. I find that I prefer the angle of my hand to be slightly less than most ergonomic mice, so I have the option with this one. So, great mouse, highly recommended. No downfalls at all.