J.F.
Love my Dyson. I've had it for 7 years and have never had to replace a filter. I had a bagless Hoover Windtunnel before my Dyson. My Dyson was more money up front but has saved me a ton in the long run because I haven't had to purchase any expensive HEPA filters to replace. Like MAMAD said, it is very low maintenance and the most we've had to do is get rid of the hair/strings that wrap around the rolling bar - but you would have that problem with any vacuum.