AB-SO-LUTE GARBAGE! The maximum operating time of a side brush is two hours. I found the first broken brush in the trash can, so it could have broken in less time too. I replaced the side brush yesterday, and 45 minutes later she brought my seven-year-old daughter to me, concerned about the health of the cleaning robot she adores so much. Now I keep the original factory side brush on one side of the vacuum as it has been running for several months - just to compare the quality. Now we come to the filters. The pre-filter has a wider mesh than the factory original and allows a significant amount of dust to pass through to the main filter, resulting in faster clogging and reduced suction power. For reference, to keep my machine running at its best, I empty the dust bin before each use. and clean the pre-filter with a soft, good quality dust brush. Our vacuum cleaner is treated like a family member. In summary, this aftermarket parts kit is so bad (pun intended) that I'm writing my first Revain review as a customer in over a decade to help you avoid the same mistake I made. .