These filters are much better than others I have used. They are easy to put in and take out. The screen at the front of the filter makes it a hundred times easier to clean than any other style without it. The replacement brush was great with nice smooth bearings and great brushes. These main brushes have been cleaned daily since purchasing the set on June 5th and so far I haven't had any issues. As for the side brush, I recommend anyone who has one of these put a small dab of hot glue on the brush before magnetizing it on the side brush. I have cats that LOVE playing with this brush and no matter the brand as it is just a magnet holding it it will come loose. I've had the same brush for a month thanks to hot glue lol.