Dyson DC40 Multi Floor
Like the Dyson DC39, the uses "Radial Root Cyclone" technology, which Dyson says maximizes suction and helps pull in more ultra-fine dirt particles. The DC40 also includes a self-adjusting cleaner head that is supposed to make moving between surfaces easier. These additions and its lightweight frame are the vacuum's major assets. The glides across carpet and hardwood with ease and has great handling. The big problem with the DC40 was its performance on carpet, both short and long.