we did our house in certainteed lap, and like eddie says, it takes paint unbelievably well. it does not shrink or swell so any pre-paint caulking stays tight also. the guys who i had install it said it was the only product they'd use on their houses. the one issue i observed is you have to take care in nailing, get too close to edges and it does crack. our house is ~2500 ft, and i dont think they used more than half a dozen or so blades.
