Found one on Ebay for less than retail so I bought it. Mounting is a combo of straps & magnets which do hold it securely. Velcro at rear of bag allows for quick removal for fueling. Not very large so you have to plan/pack accordingly. Interesting clear pocket on top for electronics such toll road passes. Pass thru for wired devices also. Overall, nice design but could have more capacity, I'll give it a B-.