I have been using WhyPark now for almost two months. I really feel it's worth the $100 investment. Do a search for WhyPark in the NamePros forums and you will find great posts (especially by Varon) reviewing WhyPark and it's many pluses. My favorite part about WhyPark is being able to control everything on your site (layout, content, where you put the AdSense code, etc). I have noticed an increase of revenue on my sites since using WhyPark.