i now automatically switch mine off, as last Saturday, the starter motor decided to throw a wobbler. the nice man from the AA said they are getting endless calls from owners of all manner of cars with SS, all with faulty starter motors. some fail, some just stop in the wrong position, and need jumping back into life, by being shorted out.
mine was the latter. however, need to have it looked at, and hopefully get the starter changed.
so we have lost confidence in the SS for the time being. and kill it immediately.