Sperry's Sub Grappling dvd good ?

Is Mario Sperry's sub Grappling any good or would you recommend other no go intructionals?

ttt

Sperry's is good.

I would also recommend:

  1. Nathan Leverton's stuff
  2. Matt Thornton FJKD2, and the no-gi DVDs from the Spring camp.
  3. Roy Harris BJJ101 (3 vols) and armlocks (2 vols)
  4. Stephan Kesting's stuff

Sperry's was good when it came out, but there is alost more to choose from now. I would keep looking...