I don't know if anyone here is familiar with this workout program but I can HIGHLY recommend it for overall weight loss & lean muscle building. Even though it's a home DVD workout, which I usually do not like, it's amazing. As a full-time mom of a little one and student, I have no spare time & found Insanity was a fairly quick and effective way to get back in shape. No need for weights or other fancy gear--just tennis shoes and comfortable clothes (or and NO gym membership...yipee).
I'm now on my second round of the program and feel great, with only a little more weight to lose before I finally reach my goal. The initial investment is worth every penny and you can now buy the set online from BeachBody (UK), who have other great workouts.
Warning, though, it will kick your b*tt.
Oh, and I don't work for the co. nor am I a BB coach.