60-mile commute from Sac to Fairfield, all year long. One piece Aerostitch that's over 13 years old. Seam seal and wash-in treatment helps keep the heavy rains from penetrating. I've also discovered to watch out how the front "buckles" while in the sitting position. Make sure it's tucked in a way to prevent collecting rainwater and putting it in your crotch. Heated jacket liner and heated grips is all I use keep you cozy and not feeling like a Stay Puff Marsh Mellow Man.
"I don't know what you do, but I know what I do, and I don't do that." --Uncle Doug, R.I.P.
"Without the possibility of death, adventure is not possible"--Reinhold Messner