It's very nice when people let you know how your teaching has helped them. Here's a wonderful email I received yesterday from someone who bought the tournament sparring dvd that I sell on the website:

"I bought a copy of your point sparring dvd last year,
and I just wanted to say that it is one of the best
investments that I have made. 

After earning my black sash a few months before
ordering your dvd, I discovered that I was no longer
competitive in a sport sparring ring.  I was trying to
compete with other black sashes with barely
intermediate sparring skills. 

After watching your dvd (and some practice) my ability
to point spar increased dramatically.  In fact, a year
later I am still using your dvd to get ready for an up
and coming tournament! 

Thank you so much for producing such a great
instructional dvd.  It truly is the best sparring
lesson I have ever had.  I highly recomend your dvd to
all martial artists that wish to become better at
point sparring. Thanks!"