The biggest complaint I had with most Harmony remotes was the Device button. I want the commands needed for the activities to show, but not the whole list for each device. Apparently, they did their testing on people who understood that using the device-specific commands would cause all kinds of problems and a former customer just didn't want to listen, or use the cheat sheets I left. One time, I showed up for a trouble call (the system worked fine, he just couldn't follow my directions) and it was powered on, switched to the wrong input on the preamp and the volume was cranked, with a bit of hiss coming from the speakers. If he had stumbled upon the correct input and the music had started, he would have blown the speakers, I would have had to talk him off of a ledge and the manufacturers wouldn't have covered the blown speakers under warranty unless I did some fancy tap dancing and begging. I turned it down, went back to the Activity Mode and pressed the button for whatever I wanted it to do- worked perfectly. He's the type who thinks he knows all about this stuff, but when it doesn't work properly, he's PO'd. The same day, I found the last cheat sheet on the desk in the 2nd floor office which wouldn't be a problem if it had been a copy, but it wasn't and the system is on the first floor.
