Linear aux dimmer will control any zwave switch or dimmer of any brand.
I have linear aux controlling GE dimmers and switches.
At the same time you can setup an enerwave motion sensor to also directly control any zwave switch or dimmer.
Zwave association by a linear aux is instant.
When I am turning on and off lights I completely forget which is the real and which is the virtual switch.
The linear supports multiple association groups but the functionality was implemented such that it is NOT really useful.
If the linear aux is set to control more than one association group this is how it works, when you tap or tap and hold it sends out instantly to association group one, then waits a few seconds and sends commands to association group 2, then wait then next association group etc.
Association groups would have been useful if # taps represents association group, but it does not/