I had Beverley Hills come in 2013 to install 5 new windows and a door. Installer was very good, took him one day. I was under the impression initially that there would be more than one installer as I was told there would be a team, but the gentleman that did the installation was very good. The installation of the door jam was a little sloppy for my liking and I had to call them back to make some adjustments on the door which they did at no cost. Also beware that if the door shifts due to the house shifting(ie frost heaves) they are not responsible. I had and continue to have problems with my door latching in the warmer months but this is because there is only crawl space underneath, not a true foundation so it will forever shift with the ground.
The windows were installed beautifully. I did have to call to have the handles on the double hung windows sanded down because they were not done during the manufacturing process and were rough, but again, they sent someone out to fix that quickly with no cost.
They are on the pricey side but I think the quality of the product and their good customer service and prompt response to any issues helps offset that a bit.