I'm not a vaccuum cleaner expert so I'm not sure what real choices I have in the bag area. I know some people believe any vaccuum that uses a bag is inferior. I personally like vaccuum cleaners WITH bags. But I'm not crazy about this particular bag. Most that I've used before have a little rubber gasket around the hole to sort of seal the opening. This one does not have that and even though I haven't noticed a huge amount of dust inside the cover of the machine, I don't feel like the bag is containing everything it should without a seal on the opening. Since I'm not an engineer I don't know the science involved. Maybe the rubber is there just to make gullible consumers like me think it's sealed. Either way, I prefer a bag with a seal. The bag itself seems otherwise well made and the seams on the ends are well-sealed. The paper is several layers thick and seems to have some kind of treatment or coating to keep the dust inside. Add a rubber gasket to the opening and I'll raise my rating.