Yet again, I foolishly bought something on impulse without first reading a review. This product is essentially worthless - about all it does is illustrate snippets of the styles of various guitar players. There is no accompanying written material to show you the notes being played - it's basically Wolf allowing you to watch him play various riffs, sometimes at slowish speed - but usually not. The explanations he gives are also useless. For example, he says "the major scale is a 7 note scale", but doesn't tell you WHICH notes. Of course I know which notes they are - but there's the rub - the only things you will understand on this video are the things you already know.This was very disappointing, since I have used his "101 must know blues licks", which is a book with tablature and explanations and an accompanying CD that is extremely useful and well done. Ditto his book of transcriptions of Wes Montgomery songs (with CD).In my limited experience, music instructional videos appear to be a way for somebody to make money doing nothing - they just sit there and play for a couple of hours while spouting random unorganized information - instead of doing the real work of writing things down.