This vacuum cleaner is so much easier to use than the one it replaced.  The old one was a bag-less type that works only for a few minutes, then you'd have to stop to tear it apart to clean the canister and filters.  The HEPA filter it had was a royal pain in the ...., it would clog up in not time at all.  No suction until it was cleaned.  Typical with all bag-less cleaners, they will not work with very fine dust.