4 out of 5 is a great score from me, 3 is average. From the young fellow who came out to measure up (which I still owe a ride in my car) to the quote, pick of materials and installers it was a far better experience than other places we tried, and we tried all the big names. We felt part of the family and valued. Why did they fail on a perfect 5? Well the installer failed to lube all the rails on the installation and one of the plastic hooks broke as a result. That would not have been a big issue, but I had to go through a person in after-sales service who I swear worked for another company, it was an inquisition and didn't make me feel like they were going to do anything. And they had no authority to do anything either. When I did get a call back from someone else, the process was easy and the installer apologised for missing the lube and fixed the issue in 5 minutes.