I purchased this with excitement with the hopes that it would be powerful enough to clear the vents in my ceilings and floors.  But it doesn't fit some of the spaces and can't pull hard enough to get the dust out.  I loved the stick detatchment for the whole device.  The self cleaning is a positive but not that exciting.  I purchased this to replace a dying competitor product but now wish I hadn't.  I didn't get the product free like all the other positive reviews.  Makes me wonder why I bought it. It's light but awkward in so many ways.