We bought this from another company in 2004 and we called the dealer for a service call because the battery was dead. That company took 5 days to return the call. In the meantime I called HME and the call back came within the hour. The technical was here the same day. He not only changed the battery that I knew was dead, he also made adjustments and explained another challenge we were having with the chair that the other company could not figure out. Stair lifts need quick responses and HME delivered. They will be taking care of the chair form now on.