I have a Shark Navagator that I bought refurbished. I decided to go with a smaller vacuum because we have stairs and because it would be easier for my gf to use. The suction is actually pretty good (it pulled a lot of junk up from the carpet the first times we used it). The mechanics of the canister are simple enough and easy enough to clean. If I were to offer any complaints it’s that the dirt reservoir is kind of small, so you have to empty it two or three times in a session, and that it doesn’t clean up after a ********* tree very easily. All in all, though, it’s proved to be a good buy.