A Dyson canister vacuum is a model style of vacuum which has a tank connected to a long hose. This type of vacuum can generally hold as much debris as an upright model. It offers compact storage and can allow you to bend and stretch your machine into tight places much more easily than an upright. The Dyson model offers a ball-shaped canister that is lighter weight than many older canister vacuums. They are powerful vacuums, but are also more expensive than some others on the market. The canister-style vacuum from Dyson will make it easier to reach underneath furniture or in other tight spaces. These vacuums tend to work well on both carpets and hardwood floors.