A friend of mine decided to buy one of the filter queen vacuums and air purifiers. She decided the next day after using the vacuum and cleaning it out that it was NOT worth the $3600. It made a mess when she cleaned out the glorified shop vac. She called the company to let them know she would be giving everything back also signed all paperwork necessary so that she could get her deposit back within the ten business days. It has been almost a month and she has still not received her deposit and has gotten the run around they've said they sent it out multiple times but has not yet received it.