The performance was outstanding and follow through exceeded my expectations. You are assigned a key contact person after the sale. Martha was assigned to me. Martha was on top of my order every step of the way. Martha is fantastic. My sales contact was with Bill Grube. He explained the windows and the process. Everything he explained happened from start to finish. The gentleman were the very best. All were experienced, and well organized. I had 37 windows instralled. They were timely and had great people skills. The cleaned up after their work both inside and outside.