SANWA Wired Ergonomic Trackball Mouse, Optical Rollerball Mice, Programmable Silent Buttons, 40mm Trackball, 600/800/1200/1600 Adjustable DPI, Compatible with MacBook, Laptop, Windows, macOS

Customers find the trackball mouse comfortable and easy to use, with plug-and-play functionality. The quality receives mixed feedback, with some praising its construction while others find it cheap-feeling. The responsiveness and cursor motion get mixed reviews, with one customer noting it works smoothly while another reports slow response times. The trackball tracking and button durability receive negative feedback, with customers reporting dragging and sticking issues and buttons wearing out.