The ergonomics are not 100% perfect but that's not the point of this mouse, it's super slim to save space. Even without amazing ergonomics, it's not bad at all. Everything else is great, from battery life to ease of setup. However, if you need a mouse that you can use for hours, you should buy a thicker and more ergonomic mouse to avoid repetitive motion injuries.
Renewed Logitech K800 Wireless ๐ก Illuminated Keyboard: Brighter, Better, and More Convenient
204 Review
A4Tech XL-747H Gaming Mouse, Blue Spider
190 Review
Wireless compact mouse Xiaomi Mi Dual Mode Wireless Mouse Silent Edition, white
174 Review
๐ฑ๏ธ Renewed Logitech M705 Wireless Marathon Mouse: 3-Year Battery & Hyper-Fast Scrolling in Ergonomic Black Design for PC/Laptop with Unifying Receiver
421 Review