I don't have a multi-vario tank bag, but I do have Nelson-Rigg panniers and Cortech tank bag - I'd definitely recommend you to take a look at those brands and they seem to be well made and not so expensive, IMO. I've had these for at least 5 years now and they've given good service with no signs of wearing out. My tank bag is an expandable one with detachable map pocket and is held on with magnets. I definitely like the ease with which I can just take it with me into a restaurant, etc. while on the road.