Results with Leslie Sansone

Hello Everybody,
I am a beginner to working out and I need to shed at least 20 lbs. I saw Leslie Sansone on Exercise TV and thought that it might be the right workout for someone like me. Our public library has the 4 mile workout so I wanted to see how it goes before buying any DVDs.
Has anybody tried her work out and lost weight ?
Any other beginner workout DVDs out there that work ? Please share.