I am an engineer and knew what needed fixed on my garage door and how it should be done, but I didn't want to take the risk of doing it myself with an infant running around under underneath the door everyday. O'Brien showed up and very professionally walked me through how my garage door worked, explained exactly what was wrong and what I could option to fix with very low pressure sales tactics, making me feel like I was making informed decisions and not just replacing things because the salesman said to. Their speed and price to replace my worn spring, and the explanation that only one door spring was unsafe should it break, was unbeatable. O'Brien would be the first place I call or recommend to anybody looking for garage door repair.