Pros: Gets right to the point in the simplest, clearest way.
Cons: You will not learn any fancy words or complex explanations.
This video is the real deal and could be the best $30 you ever spend learning to improve your skiing.
The video lessons on the DVD are great, simple, concise and to the point. Pick the lesson/area you want to improve on, watch it 5 or 10 times and go out and practice. Stand in front of the video screen and try the moves, train your muscles to make the moves. You could even take the DVD with you to the hill along with your laptop and work your way thru the lessons. No mumbo jumbo with words or explanations you don't understand.
It might just be me but I have trouble learning to improve my skiing reading a book ( and I have a few of them), watching how to do it is much more effective for me.