I called in after seeing the Core Secrets infomercial on tv, I think that was back in October. I didn't really lose weight with it, but it's fantastic when combined with a cardio program (like your running). I absolutely love my stability ball and it's an integral part of my workout regimen. I've gone on to buy a few different dvds to mix things up, but working out with Gunnar is great. The moves are simple and effective. I'm always skeptical about ordering things advertised on tv, but six months later, I'm still using Core Secrets. Ok, I think I'm done with my commercial now.
Best of luck to you!