used this sheild since day one on my CPC 1100. It worked great after a while it just stopped working and I had to go over seas for a while and when I got back it was out of warrenty. So I called astrozap and they said no problem an sent me out a new shield great customer service. The product itself is great. The customer support even better. This product DOES a great job keeping the dew off teh corrector and its well worth the money.