I changed to momentary switches with my old X10 setup, and have never looked back. They’re totally intuitive and very easy to use for anyone (if they’re on it turns them off, if off it turns them on).
I posted on [momentary switches][1] [1]: VFAQ: Lighting Control Options for UK SmartThings this morning, the Schneider range are great if you’re looking for something like that.
I got my 212s from a company called ‘Datawize’, who seem very well priced. I bought 10 at once and negotiated a bit more money off.
http://www.datawize-smarthomes.com/fibaro-z-wave-dimmer-2
HTH!