Perhaps, I just got lucky, because my yellow kill switch button has worked
great for the past 3 years of commuting. I also have left this same bike out
at the bottom of my stairs for 2 winters of the three years riding it.
To this day, if you just barely brush up against the switch, you hear the
spark hesitate. I think it's just a matter of taking a look at the switch internals when you first buy them to make sure it's all working right. I feel the throttle and switch always seem to get a bad rap when for me, they work really well.
Toby