I love my magnetic tank bag , you just need to be aware that they can scratch the paint if you're not vigilant about keeping both the magnet pads and the tank itself really clean. I don't loose any sleep about it. I once set the bag down on a metal patio chair and the magnets picked up metal filings that must have been left by the machinist that had lunch there before us. Scratched up the tank a bit before I caught it. I kind of like the patina now as it reminds me of the trip we were when it happened. I'll get a pic of it for you. The other plus is, I have a couple of bikes with metal tanks and It can swap locations in a snap, They are a must have IMHO.