We have had a Rainbow vac for 20 years. It was well over $500, but we have only had to replace one belt. I have autoimmune, so need to get any dust and pollen out of the house. The dirt goes into a water resevoir, and when the vacuuming is done, the water is disposed of safely and away from the house. This wouldn't be for everyone, but for me, it has been worth the investment.