Two reasons: 1. I've had a few technical questions about parts and fitting and I received answers the same day with the correct information. 2. When a part malfunctioned, it was not only replaced but accompanied with a second option to try out. Your customer service is above and beyond anything I expected. I tell everyone I know about your product and services. And every time I call/write, your reps are really friendly and competent. 100% satisfied with my purchase.