Logitech Optical Marble Mouse USBPS2

This mouse is a trackball mouse and one good thing about this type of mouse is that I don't need to move my hand around but only with my finger. It works great if you have limited amount of desk space or a small mouse pad. It allows my wrist and hand to rest while I work intensively because I use the mouse a lot. It is fast and accurate unlike the optical mouse which jumps sometimes. It is also intelligently designed to fit left handers because the buttons are programmable and the ambidextrous design. It collects dustly easily under the ball so I always make sure I clean them out regularly. The cleaning is super easy and fast. Once it got submerged underwater but it still works perfectly. After 3 years, this mouse is still the most reliable and underrated mouse I have ever owned.