I've had my Magneshades for a couple of years now, and absolutely love them. I think I've convinced a lot of people to get them when we are at a campground and they see how easy they are to put on and take off. Once, a magnet fell off my driver side window (My fault - I opened the window too far, and knocked it off myself). Instead of getting a replacement from the manufacturer, I just went to Home Depot and got a pack of rare earth magnets the same size for under $5. Oh, and I cut a short piece of dowel rod and laid it in the window track so I can't open the window too far and knock that magnet off again.