Have the autoswitch installed...works fine and I kinda like it....except for the my reservations below:
Let's say you have the autoswitch installed for fog or driving lights....and the lights are bright enough that dimming them for oncoming cars is a must...then let's put you driving down a winding road at night with your driving lights on and your high beams on. Due to the degree of the turn in the road, an on coming car surprises you....you have a two second delay to press and hold the turn cancel switch to turn off the accessory lights as well as turn off your high beams....therefore each hand is busy with this function....so, who's steering the bike?
Personally I like the option to use an on off switch leading to a relay (I guess it should lead to the high beam), and the relay being tripped by a connection to the high beam (power source for the relay could be a direct wire, fused connection to the battery. With the on/off switch in the off position...no accessory lights. With the switch in the on position they come on and off with the high beams.....very efficient...and effective, IMHO.