Perfection!!! I would give 10 stars, but 5 is the max. Marilyn made our old aluminum sliders like new. She surgically removed the old corroded and frozen rollers and replaced with high-quality stainless-steel rollers. She also meticulously cleaned the track well beyond what was required for basic operation. I can’t say enough great things about Marilyn and her work ethic, honesty, and determination to make your doors like new. Obviously, some things are beyond her control like header sag or other structural imperfections, but she will do her best and usually succeeds.