As close to Professional as you can get
Ease of use, effective cleaning, well thought out design
Kind of short power cable
I have owned the Sebo C3.1 for over a year now and can report that it is worth the money.
I will leave the details to the previous reviewers regarding the functioning of this machine. What I want to impart is that I really like my Sebo. It cleans effectively and quietly and I really enjoy using it. I especially like the fact that the exhaust air is vented along the outer edge of the machine. This not only eliminates the blast-of-air-in-the-face that other machines make, but acts as an air cushion for the machine when you pull it around the house-keeping it from dinging the walls and furniture.
The power head, as well, is well designed in allowing the user to move it around objects and furniture without difficulty.