I decided to buy the pulley tool, since I'm replacing my timing belt and water pump. I've heard stories of guys using 600 ft lb air impact wrenches or guys who spend half a day trying to loosen the pulley bolt using all sorts of crazy methods.  Using the tool and two two-foot breaker bars, I had the pulley bolt off in under 10 seconds. Make your life easy: Get the Honda pulley tool if you're working on Hondas.