I bought the Bagless Wind tunnel one year ago.  It is the worse use of money and energy I have ever purchased.  Hoover will not back it up and I've been told that it keeps the repair shops in business.  Mine was in the shop in the first two months because the cord stopped rewinding and the belt broke everytime I used it, not kidding.  The cord works a little better now and the belt now only breaks every other tme I vacuum.  By the way, you have to remove a lot of screws to replace the belt.  I buy the belts 5 at a time.  You mght ask what Hoover says, they say, "talk to your repair shop." ...