My client is an IT professional, not sure what flavor. I texted him my thoughts not long ago today, haven't heard back. One advantage is we could test the wiresless set-up w/o putting a hole in the wall for the switch. I gather that at least with some of them they are held on by strong two sided adhesive tape or some other glue. The Runlesswire switch gets it's power for sending the signal from the movement of the toggle switch. One article I read mentioned that there is a small effort to the movement, only makes sense, not sure I can find a retail display to experience that ahead of time.

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1984 300D, 138K