I've had Penguin Windows on my house for over a year. I love them as much now as I did the day they were put in. Despite noticeably lower electric bills, they really keep the street noise out on the street and out of my house. Great company to work with-- I received nothing but great customer service from our saleman Glenn to our installation team. As for these other whiny reviewers: A salesman is a salesman. They're trying to sell you a product. If you're not interested, get over it and move on with your lives, instead of slamming the company on the internet. Jeez...
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