I clean offices. Have owned it for 13 years. I know a little bit about vacuum cleaners. Yesterday before work I installed a new roller brush and belt. Half an hour later the belt slipped and smelled like burnt rubber. I have disassembled. nothing I could see causing the problem. Nuts are very simple and I'm really experienced with mechanics. It still smells like burnt rubber. I later found out that this is a defective belt. General / Poor quality. I will buy the original like I always have. This Oreck XL commercial is 17 months old and I vacuum 100,000 square feet of it every month. It was an OUTSTANDING vacuum cleaner. I will buy another one very soon! ADVERTISING. I got a normal oreck. It lasts 3 months!