Watched MBB-4 for the first time last night. It will definitely take me a few more viewings before I absorb most of the material; it definitely gives you a lot to think about.
As each new volume of the MBB series came out, I wondered what they would come up with to keep from repeating themselves and getting stale. I have never been disappointed. MBB-4 is different from all the others, as it focuses mostly on the mental aspects of shooting the bow.
I'm sure they didn't plan it this way, but MBB-4 is a natural conclusion to the series, as you first have to learn to shoot the bow before before you can develop the mental blocks that keep you from shooting it as well as you should be able to shoot it.
As with the others in the series, MBB-4 is well produced and kept my interest high throughout.