I've only gotten about 2 years of use out of each of mine, and I've owned 4 in the past 6 years. I've changed to the newer Kensington models, and I like the scr

I've only gotten about 2 years of use out of each of mine, and I've owned 4 in the past 6 years. I've changed to the newer Kensington models, and I like the scroll ring, but the ball movent seems more jumpy. Maybe one of those ploopys would be my nexy move if the Kensington dies or if I want to play a game.