A couple of people with pretty good credentials (Barnett and Bryonl) say not to use it. I doubt any of us would be using it at -40F so the only thing its got going for it is that it doesn't attack paint (which I really like). On the negative it has the soft pedal which can increase with altitude, and the corrosion problem. Personally my brake fluid only gets changed occasionally, hasn't been spilled on the paint and so far hasn't been a problem (knock on wood). I guess it depends if you drive at altitude, drive it a lot and need frequent maintenance, or intend to change the fluid often. I don't do any of those things, probably like you Ed, so it just doesn't matter: