Love that they match our Tier v8. Returned some of the lost suction power we had. The pre-filters must be placed exactly so that they fit perfectly. Something you really need to play around with a few times, or you might need to record. My vacuum still has a slight odor but I think that after a thorough cleaning of the canister we should be working like new! This is a great kit to buy to have backups when you need them. I recommend it for convenience but I hope they fix the fit issue.