Excellent job in explaining the available products and scope of service covered under the contract. The replacement windows were their Preservation Window line, built by Alside Window Company to Premier's specs. All windows except two narrow (~12" wide) had double locks. All are tip-in for cleaning both sides from inside the house. All had full screen option, solid vinyl, welded, double glazed, Lo-E argon, with interior grids. You really need to see the window to be able to compare it to others. I don't recall the R rating, but it was higher than any others. Lots of detail to sealing wind around all the edges. I even liked the design of the weep holes that were less noticeable than in other vendors (we looked at four different ones, including Pella). Lifetime warranty on glass breakage, seal failure of the glass, vinyl cracking/splitting, sliding mechanisms, etc. House is noticeably quieter (less outside noise), especially in high winds. Premier offered various manufacturers of the siding. We wanted double four with a cedar grain in a particular color. They looked to another manufacturer (PlyGem Variform vortex extreme) to find what we wanted. Interlocking system withstands 225 mph winds. Color embedded throughout siding (you can't scratch it off). 16'8" lengths reduces the number of seams over shorter pieces of siding. Rolled double nail hem. .046 thickness. 3/4" reveal at bottom edge (provides a bigger shadow like you would find in actual wood clapboard siding). 50 year transferrable warranty. - 100% first five years, then pro-rate over remaining 45 years. Fading guarantee based on 3 micron depth - most others measure fade at a greater depth. Exterior lights have a block mounting plate so light fixtures can be changed without having to cut or trim the existing siding Soffit - vent slots are inside recessed areas rather than exposed - cleaner looking. Gutters are seamless - 5" to carry more load, and 27 gauge material. The crew was very friendly and professional. I purchased new shutters and they installed them at no charge. They routinely cleaned up - including cigarette butts from a smoker (zero smoking inside the house). There was very little I had to do once they left. They were excellent at details, including laying the siding so the exposed butt end was not facing the street. Looking from the street, one length of siding blends smoothly into the next. Only issue was one window that didn't quite fit right and bowed slightly at the bottom. They came and trimmed it to lay flat within a few days - about a 15 minute fix. Neighbors were highly impressed, and one hired Premier to replace a living room double window with a bay window from them. Bottom line - Quality product that you have to pay a little more for, but is worth the investment in terms of what you receive. Outstanding customer service by not only the salesman who wants to provide what you want, but also the workers who pay attention to all the details during the installation. A contractor I feel I could trust.