I have the Harmony 650. As I recall, It does work with the Logitech Harmony Remote Software, along with the 550, 720, and 880, which I have used before.

The only remote I could not use with the older software, was the 300, which I got for my dad.

I have been eying Acoustic Research remotes. The ones on eBay, seem to come from Hong Kong, and this has me really worried, as they might be knockoffs. Anyone have some knowledge about these Xsight Touches direct from China?