Kensington Ergonomic Vertical Wireless Mouse (K75575WW), Grey/Black

Customers find the mouse comfortable with no pain or discomfort, and appreciate how it reduces wrist pain. However, the ergonomic design receives mixed feedback, with some saying it's great while others note it's not as ergonomic as other models. Moreover, the reliability, button responsiveness, and usability get mixed reviews - while some say it works well, others report it stops working, buttons become unresponsive, and find it frustrating to use. Additionally, the cursor movement is problematic as it tends to jump around the screen, and durability is a concern as the scroll wheel breaks after a couple of months of use.