Brushes and filters fit our S5 perfectly with no issues (used for over a month before writing this review). The filter is covered with a screen, which makes it easy to clean. very basic but I'm not sure how to clean the filter behind the mesh if you can't clean it as the mesh is in the way. So far so good, although I just scrape the mesh and tap out the brush and the S5 doesn't complain about a dirty filter, so it's fine. The brush is awesome and lifesaver. It took forever to detangle 3 feet or more of hair from the ends of OEM brushes on 3 long haired women every day. These brushes are fantastic. Just twist the ends to pop out, pin the ends back in place and voila, all the hair is gone. Roborock should use this design in its brushes. The brushes alone make this bundle worth the price, the rest is just gravy. As a side note, there are arrows on the ends showing which way they pop out. What's weird is that the square end of the brush has little clips on the inside I guess to help it stay inside? Eventually one of the pins holding them came out and then one side of the clip and spring fell out. I was concerned, but it didn't affect the brush in any way, so I literally have no idea why the designers chose those superfluous subtle details that don't affect the job. Considering the OEM brush doesn't have them and just has a regular square end they seem completely unnecessary for installing the brush, luckily we haven't had any issues with these third party brushes. The only real complaint is that the side brushes aren't actually brushes. but only silicone/rubber pens, they are suitable for S5, but I would prefer real brushes. However, the main brush replacement design is SO SUPERIOR compared to the OEM brushes that this pack is totally worth the cost regardless of the other items. You will not regret it.