I have been playing Guitar for quite a while, but mainly just strumming. A few years ago I started practicing scales. I got fairly good at them, but felt like I didn't know what to do with them. I bought this video along with the 4 Hour Bluegrass workout and together these have really helped a lot. I feel that I have a much better command of the fingerboard, in the first position especially. After 1 month of practicing at least 1 hour a day and sometimes more, my speed has definitely picked up and my right hand crosspicking is more accurate.
Both this DVD and the 4 hour workout push you to go faster, usually faster than you feel like you are ready for. But that is the way that Steve helps you build up speed. Even though I thought in the beginning that it would take a long time to build up that kind of speed, I can notice the difference already.
I now find myself wanting to play Guitar more often because of the improvement. There are only a few songs on the DVD, so I would recommend getting the 4 hour workout to go along with the video. That way you have plenty to practice with. Then, practice, practice, practice...