Not used cloth bag in the sebo. Used one in an Henry and its a bit of a pain - really got to get all out of it for it to do its job efficiently.
The Sebo paper bag is a big bag. If you use one per week then its only what - about 70p (and I am sure I dont use one per week because whilst I usually vac, I also ask the householder to vac before I get there - that way A0 there is not a lot left for the Sebo b) the pig stys get a clean up. I had to tell a custy the other day that I clean carpets and not the main vaccing of the week (this looked like a month).