This replacement filter set works great and costs a lot less than big brands. I've only had the Shark for about 6 months and have been cleaning and rinsing the filters regularly, but I've found that it's not working as well as it did when I first started. I found the model number online and had no idea they recommended changing all filters every 3 months! I immediately ordered this replacement set and my vacuum cleaner is like new! All the same! From now on I will definitely change the filters every 3 months, especially since I get such a big discount on it.