I have always found in the past that the hoover vaccuum that uses the bag is a good quality vaccuum cleaner but the new bagless hoovers seem to have a very thin hose that connects to the vaccuum that constantly gets clooged and loses its power many a times I found myself taking apart the vaccuum to unclog the hose.  I will no longer buy the hoover bagless vaccuum.  I recently bought a hoover  that uses the bag and has a wider hose and I am very happy with it. It has very strong suction.