I'm currently doing the 4 hour body workout which sounds similar. I've always been in pretty good shape but after trying some of these 30 minute workouts 3 days a week, I'm a firm believer that you don't need to be spending hours in the gym everyday mindlessly going through the repetitions like a lot of people are led to believe.

The page you link to looks a bit like typical internet marketing sales letter spam so I'm a bit skeptical of it, but I'll give the download a try.