I bought the Sanitaire SC684 because I just started a cleaning business and I needed a good vacuum cleaner. I already owned a SC889 and knew that Sanitaire was a good Vacuum Cleaner. I bidded on it not knowing how good the 684 was.This is a good light weight vac. with good suction. The only thing I dislike about it is that it's only 12 inches of cleaning width, but the plus side of this machine out weigh the negative.