The device uses disposable bags - you don't have to get yourself dirty emptying and cleaning it.
The device can work longer without needing to be emptied.
Devices with wider brush can clean your floors in less time.
The cord automatically winds up, reducing hassle with storage.
The powerheads bumper is protected so you don't knock the paint on baseboards or damage furniture when you bump into them.
Devices with this form are lighter and take up less space. They are ideal for cleaning stairs, hard floors, upholstery and for cleaning in between furniture. They are generally more affordable.