So I have had this for all 7,000 miles I've put on my lovely zx14 and have been very pleased with it. I use magnets on the back and suction cups on the front. So far its been tested at very high speeds and and cross winds and has had a lot of weight in it and never came loose. The only time it has ever come loose was when it was below freezing and the suction cups came loose at the beginning of my ride. I've never owned a piece of gear that I've been impressed enough with to report on a forum about it but tonight my wife and I had to stop for beer on the way home and it held a six pack of twisted tea and a six pack of tall boy Coors lights.