Filter, brush and squeegee appear to work fine but as others have written and I should have read more closely, the small rotating side brush does not fit properly. It would be better if they put a screw in it because the screw that comes with the rumba itself is too big to fit the hole. Another note: the side brushes point so hard at the floor that they got caught under my covers one night. This never happens with the original side brush. I fixed the whole problem as others have mentioned by carefully drilling a screw hole for the screw to go in. The way I fixed the angle of the brushes was to heat the plastic handles of each of them and bend them towards the floor of the room, only to lift them by a hair off the floor or at least not get under the carpet, if rumba try will stand on the carpet.