Our salesman James was very professional and full of industry knowledge. Having no real knowledge of windows prior to meeting with James I walked away with a true understanding of why Worthington Windows are a superior product and why Illinois Energy?s lifetime warranty is different than other lifetime limited warranties. Working with James we split the windows into groups that will get installed incrementally. This is a more affordable option for us allowing us to pay in full rather than finance. Our home is only 10 years old but the windows the builder installed were garbage; drafty in the winter and rusted in-between the panes. Installation went smoothly; our installer was very polite and respectful. The windows were installed in a day and everything was cleaned and patched before they left. I would definitely recommend Illinois Energy Windows and Siding to anyone looking to have a superior product installed by professionals in their home or business. Our windows look amazing and perform as promised. We look forward to having the next batch of windows done soon.