I had a rather expensive wall-mounted garage vacuum from another leading manufacturer for several years, but was never happy with its performance. An unusual cloth filter stuffed up into the unit needed to be cleaned frequently in order to get any type of suction, and it left a big mess on the floor and my hands every time I had to clean it. I moved it to another garage and purchased the 18P03. What a difference ! This vac has easily twice the suction power - in fact it is similar to the suction of the commercial vac at a local car wash. Additionally it is very easy to empty and clean. You really can't go wrong with this unit !