The Dirty Tricks remind me of a programmer jargon: dirty, but it does. Quite so, it is not here. Here special facts, special techniques, special tricks are revealed. It is very striking how professionals act in certain areas. Certainly, you can get out of each drawing. But when it is exact or tricky, this DVD is a great help.
Since I am not a professional, it was very exciting times to see everything. But I myself have no utility value thereof. For me, for my application this DVD a level was too high.
My Conclusion: This DVD is made for a professional!