Before adding Gamemaster's DVD to the
BlackjackInfo store, I reviewed it and two other instructional DVDs. (The other two were from different factions of the famous MIT blackjack team.)
I think Gamemaster's DVD is the most useful for actually learning to count cards. It's not a highly polished production though. Imagine if you set out to make a video in your home. It's sorta like that. But the Gamemaster's information is accurate and well-presented. He gives a lot of 'homework', showing you how best to practice, etc.
The two MIT efforts looked much more professional, but they seemed pretty short of the actual stuff it takes for a new player to learn.
I think Gamemaster's DVD is well worth the price for anyone who wants to learn to count cards.