Worth it
I'm very glad and relived to have found this DVD.  It is the only instruction option in English for my device (NV-07A).  The DVD was informative and certainly helped me learn to navigate and troubleshoot my machine (since the instructions that came with the machine were almost no help at all).  However, I rated this only 4 stars because it did not cover how to properly perform a micro-current facial.  It would have been nice to see how that is performed because it is not your typical micro-current hand piece.
Rating: 4 stars