Well, so far, I'm giving 5 stars. They gave a good price. The window was available to install on time. The installer showed up with the correct window that was in perfect condition. Installation was completed on time and done nearly to perfection, which is more than I can say for other work that was done on my house by other contractors. Granted, though, I am particular. Would I use One Call Home Improvement & Maintenance again? I am planning to do so next year when I have the rest of my windows retrofitted.