I love my simplicity even though it requires bags and weekly bag changes. I bought a bag on sale but noticed dust in the canister when changing the bag. I gritted my teeth and bought a stamp. Is it important. Unfortunately not in the number of bag changes, but in dust containment. Depending on how picky you are, the material of these bags will be heavier and more opaque. Any consumer who uses them for allergy reasons should definitely buy the more expensive brand.