This means cleaner air in your room. Uprights do not have a low profile, about 5 inches, and will not get under some items. Usually it is easy to push. The canister behind you and hose and power in front of you. This can be difficult in a tight place.
Some vacuums have a rug-floor selector .
This is usually a premium. This feature will allow you to clean both rugs and hard surfaces with the same vacuum. Electric brooms are effective on hard floors. If you choose a canister they usually have a soft floor brush to do hard floors. Some vacuums have high filtration, others try to lead you to believe they do.