Recent Review: I had 4 window companies come out and give me quotes. Without a doubt, Dale, from D & W was the most professional, informative and easy to work with. He provided a most competitive price, and with the advantages of their windows, I went with D & W. Advantages of their windows included they make their own windows, and so I was only dealing with one company for both installation and manufacturing. If I had a problem, I had to make only one call and avoid any possible finger pointing between the installer and manufacturer. A 50 year, transferable warranty was also very impressive considering I will be selling my house in a few years. I had thoroughly researched window quality and I felt their product was second to none. Dale explained that not only did their windows/doors meet or exceed Engerystar ratings of 0.30 U-factor or less (windows rated 0.27-0.28, doors at 0.30), but that they used virgin vinyl and also provided a solid filler in the frame. Compare that to other window manufacturers whose window frames are hollow and use recycled vinyl, which will breakdown over time. . I thought Wallside windows would be the best value and cost, but they were not. I believe their window frames are hollow and I wasn't impressed with the company and their advertising which I consider very misleading. Have you noticed their TV commercials claim every week, that their current offer of 50% every window expires on Tuesday? They have been running that ad for a long, long time. They simply renew it each week I assume. And they offer 5 year FREE financing? Their salesman reiterated he couldn't guarantee the 50% off price past Tuesday. I planned on using the free financing but then I was told that there was a "cash discount" of $1,400, which meant that if I financed I would pay $1,400 in finance fees. They don't call it interest, but they get you if you want to finance. And they were not the cheapest compared to D & W. . Weatherguard Windows also come out. Granted, they offer a commercial grade window which may be superior to a certain degree in construction, but not for $20,000. When the salesman quoted me that price and I told him I would have to consider it, he asked me that if he called his boss and got his approval, and lowered his price to $14,000, would I sign that day. So obviously the company was still making a profit at $14,000, but this salesman was ready to charge me an additional $6,000 without a second thought I told him to get out. The installers arrived on the day promised and at the time promised, and they said it would be a 2-3 day job. It took them 2.5 days to complete. Removal of the old windows and clean up was very satisfactory. I was surprised to see that the overall rating for D & W was a B grade, because of the 4 companies that I received quotes from, D & W had the best salesman, the best price, the quality that I wanted - solid frames, Low-E and argon filled, Energystar rated (I received a $320 rebate from Consumers Engery for this rating), and an installer that has being installing windows for D & W since 1989.