i had the later style monster one fits easy to get on and off, plenty space with top pocket for change etc down points - not waterproof (but a bag was supplied), you have to unclip it to get petrol but then balance it with one hand, quite awkward but not impossible on your own the sw motech ones look better, im tempted to get one for my newer bike, but look before you buy as the horshoe clip inside the bag makes it half the size it looks, buy the bigger one.... hth
I have a Black Baglux tank cover and bag branded as Ducati Performance. got them when I bought my S4 Monster new. The Monster is long gone but not the luggage if your interested
