I bought my house during the buyer's market a few years ago and seller agreed to throw in some brand-new windows from Long. We met with the Long representative shortly after moving in, and they were very knowledgeable about the product and explained it in detail. The windows are wonderful. They trap heat well and they are very easy to remove and clean. About half our neighborhood has used Long now, because the positive word of mouth is spreading. The only drawback is they are expensive, but you have to pay for quality.