Brock windows did an excellent job replacing all the windows our home. We chose them because of their NorthStar windows and reviews of their quality installs. The Northstar windows looked better and seemed to be more solid in construction than any of the other windows we looked at. The only issue we had was with the salesperson. Initially we just wanted to get a "feel" for the cost and get estimates and we told that to the sales guy when he came in January (their slow time). Yet we never got the quote that the sales person was supposed to send us. When we finally decided to go ahead a couple months later and called them again, we got the same sales guy. He couldn't find any info on us or his quote from his previous visit. If it wasn't for the good reviews, we would have not called them back. The other issue is that we had 2 AC units in the windows and I specifically mentioned them to the salesperson that I could not move them (I am small and cannot lift a 12000BTU AC on my own). He assured me they would take care of it. Apparently he was supposed to note it on the order receipt with all the other details. This is was not done and installers would not touch it until they got the go ahead from the sales guy. Brock was going to charge extra to have them move and I had to call and argue with them before they gave the go ahead without charging extra.
On the flip side, the installers were amazing. They did an excellent job. They were fast and clean and their workmanship was immaculate. I did my research on what should be done when installing windows and they did things correctly and worked quite fast. They also did an excellent cleanup afterwards. There were a couple issues with some bent window screens but they came back and replaced them without fuss. The installers are the only reason this review is a 9 and I gladly overlook any issues with sales. And when it comes to windows, the install is as important as the window itself.
I would definitely consider Brock again in the future but I would make sure anything discussed is put down in writing when making any order and before signing anything.