My Logitech Harmony 655 multi-remote is a great gadget. It allows us to get away with using a single remote most of the time. To set it up you have to log into their web site and configure everything, then the site downloads a file which is transferred via USB to the device using an application installed on the PC. Unfortunately this application is not available for Linux so I have to make use of a Windows machine.
I was trying to set it up for my new DVD player yesterday when I found that I couldn't get into the screen that lets me re-program the buttons. I sent them a bug report. Later that afternoon I had a reply to say it was fixed. This was on a Sunday! They had fixed it, but something else had gone awry and I had lost some other settings somehow. I've reported that too. I also inquired about whether there will ever be a Linux version of the software.
The most serious problem I have had with this device is that the up/down buttons for changing volume and channel have become very intermittent. This would seem to be a hardware issue that I may be able to resolve by opening it up, but for now I have just added those functions to the programmable buttons alongside the screen.