I've been using it for a little over a year and we don't use the vacuum very often. The cog being driven by the felt breaks/loosens so the belt is essentially only driven by friction on a flat surface and a splitter which I believe held the cog in place. Seems to be a design flaw that could be related to rings or gears of different models. One end also fell off where the camp is located. I uploaded a photo of an old brush with the gear intact and it has disappeared from the review.