I should add that 'my' definition of a 'switch' is an electrical circuit open and closing device. Not a big stick with which to beat people! Although...
Seriously (what, the gun comment wasn't serious?) if you ride with an open face or flip front helmet then wind noise can seriously degrade the comprehension, by the system, of voice commands!
I prefer my interpretation.
Installation into my full face Shoei was quick and straightforward.
I used the stick on mic and it's OK for voice commands.
At motorway speeds I have to shout at it take make myself clearly understood; not entirely dislike a marriage in that respect.
I might try the boom mic option which could be placed closer to my mouth so it should be better but it may not be as neat or convenient.
The TomTom has arrived and is currently updating so I'm off to solder the adapter for the K13s GPS power connecter to the TomTom harness.