A freind of mine picked up the mat serra instructional and I was curious so he let me borrow them. I have to say in terms of bjj instructional he really doesnt teach anything revolutionary but he goes over basic stuff very well and his explanations are very easy to follow. He goes over a lot of the details you might miss. Im not a fan of learning str8 from instructionals but its a great set to pick up to compliment your training and reinforce what your learning. Great base to build on. In the guard tape he teaches the arm bar triangle omo plata and how to transition from each sub. Not anything to overly complicated but its the basic shit that usually works the best. Volume 1 - The Guard http://www.megaupload.com/?d=IMUGGB68 Volume 2 - Side Control http://www.megaupload.com/?d=80H8B5WL Volume 3 - The Mount http://www.megaupload.com/?d=3WXTUFH2 Volume 4 - The Back http://www.megaupload.com/?d=ZU699BDF got it on mega upload for any one thats curious or interested. Im sure the bjj crew isnt going to see anything new but Im not used to omo platas and when I attempt them they come out pretty sloppy so this really helped me clean it up.