If you are a beginning to intermediate guitar player, this will definitely help. If buying used, try to find one that has the tablature booklet included. When I was shopping for this, the third or fourth down the list actually said it included the book, so that's the one I bought, it was a couple dollars more, but to me it was worth it. I would be totally lost without having the book as a reference. I knew who John Petrucci was, mostly due to seeing his guitars in all the catalogs, but I was unfamiliar with him as a player ~ didn't like or dislike him, just didn't really know. After this video, I can say I like him and will be checking out his music. A guitar playing friend turned me on to this DVD and I am glad he did. In just a few days, my level of playing and confidence has gone way up. I have a whole new bag of tricks. I would say this is definitely worth while, even if you don't particularly like his style of music because the things he teaches can be used playing any style. In short, I would recommend this DVD highly. It has gotten daily use since it arrived, and I find myself looking forward to tomorrow's practice to see what has become subconscious and how much faster I can play than even yesterday. It's scary to think where I might be in a year, playing things I always thought impossible. Thanks to John Petrucci for putting in the time and effort to make this DVD and sharing really useful information.