Logitech Wireless Trackball M570 (Renewed)

Customers find the trackball reliable, with one mentioning it works well with Logitech unifying software, and many consider it the best trackball they've used. They appreciate its value for money, ease of use, and comfort, noting it keeps wrists from hurting and prevents hand fatigue. The durability receives mixed feedback - while some say it lasts for years, others report it breaking after a month. The smooth movement aspect also gets mixed reviews.