Mine was when i had got a $5 mouse from Microcenter for my new computer just to start . I got used to it and used it for 3 years and it surprisingly lasted that long flawlessly. Until last week the scroll wheel broke , I opened it up and turns out the plastic broke and was unfixable. So I bought a new mouse that was much better in general but I still haven't gotten used to it and is really annoying to use