Darrin Coleman has been servicing our generator for more than eight years. He has expert knowledge of the generator and can troubleshoot pretty well anything that might arise. Even better, Darrin proactively deals with problems that may be on the horizon. I would far rather deal with emerging issues in September, which is when Darrin services the generator, than have malfunctions in mid-February. Thanks to Darrin staying on top of things, our generator has performed superbly year after year. I would highly recommend Mountain Generator Services to anyone looking to purchase a generator or to service their existing one.