It has been on the car for at least 6 years and it stayed stuck on until I just took it off. It worked really, really well. I would be able to have the window down when raining and this would keep the rain out. Just use some simple 3M tape to stick it on and it works great. It is still in fantastic condition.
$40 shipped within Canada and US, or best reasonable offer.
Some photos:
*See signature for my feedback.