Very comprehensive bundle for anyone serious about improving their skills on the harmonica.
There's a lot of good stuff on the internet about modes and scales, but I still struggle to be clear and to actually HEAR the difference in detail on a harmonica. David Herzhaft's DVDs allow ma to do that. Not only does he explain the modes in detail but he also provides multiple examples of how they're used and even has loops that can be utilized for practicing each mode. I'm a hard-head and it helps that I can listen to the DVD over and over again until the modes make sense, or until I get a better sense of how and when they are utilized.