markku:
You're missing the point. The point is not at all the money, at least for me, it's keeping my original windshield. Not to mention, even if I were to get some BS $200 windshield to replace it or spend significantly more $ and replace it with what's there (sekurit), I will probably end up with the same problem in 2 years with the exception of having lost the original shield, and / or being stuck with some BS shield. I'm just not convinced replacing the windshield is a significantly better solution than simply addressing the problem itself.

jammer: I am aware of the facts you state and you pretty much rewrote the ad for the products I used. It will last for ~ 4 months (according to them) and based on what I used I would say I'll get 5 or 6 more apps from the kit. I know it's not a permanent solution for the windshield, but neither is wax for the paint. I'm happy with the results and it is my solution anyway.

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1982 Mercedes-Benz 300CD
1982 Mercedes-Benz 240D - stick