Rear Plastic Window Crease/Wrinkle Preventer

There is a new item on Ebay that people seem to be buying a lot of. It's called the S2000 Window Wrinkle Preventer. Everyone on S2Ki says that it works great. I found it on Ebay by searching for S2000 Window wrinkle

The guy usually keeps his listing up unless he's low on supplies.

Has anyone tried these? He ships anywhere in the world!

Just thought I would ask......