This is a GREAT value. I bought these at the same time as the vacuum as I knew I would need replacement parts so I didn't have to spend time cleaning ONE of the kits along with the vacuum if I didn't want to. Now I just put a new one in every few uses and can clean all the parts at once when it suits me. And they get dirty easily and quickly depending on what you're vacuuming, so having spares available is a lifesaver. I can see NO difference in design or performance between these and the original filters included in the kit. One note: I seriously doubt any of them. these filters are actually "HEPA". This is a misuse of the term.