I haven't yet, I was going to wait until after Xmas to see if I can pick it up in the sales. I've got Davina's other DVD's (except for the pregnancy & post natal one) and really like them, so I thought it would be a good bet I'd like this one too.
I tend to find that they do work you quite hard, especially the 'Power of three' one, but it's well worth it for the results.
By the time I get towards the last third of the DVD and start doing the floor work, it takes all my strength to drag myself onto my feet for the interval cardio - I've been known to call to the heavens and utter a few expletives many a time
I bought the DAvina 5 DVD in early Jan and if you don't have it already it's great! helps me to avoid exercise boredom because there are different sessions I can choose depending on my energy levels (ie the aerobics can be challenging! -mmm