This product is great for folding roofs! I always dream of convertibles, but after a few months of ownership I sell it, get angry, buy another one and, according to my wife, repeat the process too often. I always seem to find great deals on convertibles until I realize they all have the same problem: a leaking rear window. The thing works great! A few tips I've learned over the years: Tape the window and top with masking tape to avoid (as much as possible) messy overlays on the top and windows. Also, I use an air mattress to press down on the inner window to create a tight seal. Still a great thing, it has never leaked but I don't keep it for more than 6 months either so who knows how long.