I alway try to ride my 16mile rt commute with no brakes
but to me the brake is like a helmet........
Like, lets say you unclipped to ride home in 4" of snow that
fell while you were in work and you started to go down an
icy hill and one of yer feets slipped off the pedals that are now
spinning too fast to put back on......this never happened to me
last thursday, of course, just using it as a scenerio

Yeah, you dont want the added complication but on
the rare time you need it, you are really, really glad
its there !