Once detached, it takes up little space and fits without pb in the saddle box (even roadsters).
Important note: I did not hook on my bike, but the presence of passenger handles solved the problem: other hooks were set at the base of the license plate holder or on the passenger footrests media . In short, unless you have a smooth back while you will find points of attachment.
Negatives: RAS. If you need it, in a word: go for it.