Just wanted to tell you all about great customer service I received from Logitech. My Harmony 555 developed a minor fault, still within the 2 year warranty. I emailed Logitech and they suggested a software manipulation, which failed. So they offered me a replacement. They suggested a Harmony 600 as 555 is no longer manufactured. Unfortunately the 600 will not control my 7 devices. As a result Logitech offered the 700 which does support up to 8 devices. If was very straight forward, with no dispute from Logitech. Wonderful Customer Service.