Positives: lots of data, good information, well organized.Negatives: "close-up" easy to follow information is something one would expect from a paid app. Only one section provides this. I can look up YouTube videos up on my own for free.Overall, not worth paying the app fee.

Roy Dean is an amazing jiu jitsu practitioner and instructor, straight up. His method for explaining moves are VERY clear and concise, and I highly recommend this as well as his other items like the Blue Belt and Purple Belt videos.The criticism I have is that the iphone app is just a simple port of the videos to the iphone with no consideration given to the form factor and user experience on a small screen. There's a huge opportunity on the iOS devices to really think out of the box and do something innovative, and I hope to see this app turn into something more eventually, but as a convenient way to watch RD's videos, I cant complain at all.One other thing is that with the smaller screen, I think the videos need to be changed (dare I say.. re shot?) in some instances to provide close ups, especially when dealing with the small movements required for wrist locks.Overall, this is great value, and I recommend it.

For me, it's a great app. I practice Aikido but seeing the corelation, I now appreciate BJJ more than I did before.

VIEWED AGAIN FOR REVIEW (most recent) very clear videos of wristlocks --- DEFINITELY WORTH the purchase price --a very good deal! . I do recommend getting a grappling dummy for practice though if you are not in a dojo, so that you can automatically program that skill set into your neurology. Because it is a skill, just like typing or playing the guitar or a sport, you won't get the necessary precision without practice. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~I just views the videos again and I definitely recommend them.. Roy Dean does provide close ups of the techniques at different angles several times...so you can see EXACTLY what he is doing to apply pressure and force to the wrist and elbow to gain control of the opponent. Actually they are decent videos ..some are better than others but it will help to gain a greater understanding of the mechanics for this type of martial art. But the reality is all the theory won't help you unless you get some kind of practice , either with a real person or a grappling dummy .... It's such a specialized art when it comes to gaining control of the wrist and arm, this skill can only be effectively learned through constant practice.His video about getting out of the line of attack is very good with explaining and visuals ....after reviewing the videos more I am giving it a better review ...they are good videos to get an understanding of how techniques work but only as a supplement which cannot be substituted for practice...there are some techniques you can practice on your own , such as getting out of the line of attack