When I went with the ion desk I was told that I might want to wait for the advent of some new RFU because the one offered sucks and its cost is a large percentage of the price of the Ion itself. Two years later and the only progress made is an app for Iphone users only with no plans to expand to the great unwashed anytime soon. I spoke with a few of my contemporaries who had bought the ETC RFU recommended and are in the throes of regret (poor wretches). So now I have no remote control of my dimmers and I have no interns because of budget cuts. I refuse to drink the Apple kool-aid for personal reasons and I get nothing but a tap number from ETC. I'm starting to feel like a Strand customer.