I commute and road ride mostly on Specialized Armadillos. Not a single puncture flat in close to 20,000 miles (3 sets of tires, 700x25, 700x23, and 26x1.5"). I avoid the right side of the shoulder at all times and ride in the traffic lane whenever possible to avoid almost all debris. The Armadillos take care of anything I might run over when I need to use the shoulder to let traffic pass. I always carry a pump and patches but often forget a tube when on my road bike because it's been so long since I've had a flat.