If anyone knows the trackball better than the Logitech MX ERGO, then they have not used this device. Better at the moment (06202222) - no. There is not. Does not exist. And, yes - I have something to compare. For - I'm afraid to lie - it seems ~ 3-4 years of operation of MX ERGO, at work (40 hours a week of active pawing!), at home I went through 4 trackballs: - predecessor Logitech M570; - wired Logitech trackman Marble; - Kensington Expet with wrist rest; - gaming, 8-button Elecom deft PRO; Mice different: prices, forms and functions. All bought and sold within a few months. Until I gave up and bought the Logitech MX ERGO - a trackball that you don't have to sell!
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