Gilkey did twelve replacement windows and two sliding doors for me about 10 years ago and I am really happy. The installation team came in and did the entire job in one day with little/no impact on us. Have had some problems with the sliding window locks breaking, but after having them come out to replace the second one, the tech said "Can you work a screwdriver?" and then left me about a half dozen of the locks if any more break. (I have had two more break since then). But beyond that they were great to work with.
Funny story is I had Champion out right before Gilkey and the salesman for Champion was a jerk from the start. When he found out I was talking to Gilkey, he started slamming the sales guy by name, saying the Gilkey guy used to work for him and he had to fire him and sue him and wouldn't ever even let him walk into his house, and I should just cancel the meeting with Gilkey and buy from Champion right now etc etc etc. When the Gilkey guy showed up he was straight up, said yep I worked for him for 6 months, the guy was an a$$ to work for so I quit. Gilkey guy laid out the facts that basically the window are so similar that each has one or two things they do different so that they can say ours is better because of X and Y and the other guys do Z which is no good. Gave me the quote and said, "That is it, I am not going to waste any more of you time, look it over and let me know what you decide" Really good sales experience. I went with Gilkey even though they were just slightly more expensive. Champion guy called back a couple of days later to find out why I hadn't bought yet and when I told him I went with Gilkey because I liked the guy he fired better them him he lost it and we went from unprofessional to me just hanging up on him.
JLE