The Unishock bulkhead IS AWESOME!!! It totally saved my ankles.
This spring I was paddling an 07 Rocker (usually paddle a Burn) and took one of my hardest pitons ever - a 15 - 18 foot drop into 6 inches of water. (I was supposed to land flat).
Check out the VIDEO of this piton here: The Colorado Kayak Chronicle: North Fork of the South Arkansas
I am the hacker in the green boat....after the second falls (where I piton) look closely at the bow of the boat and you can see a huge dent....which popped out to full form the next day in the sun.
Anyway, that incident sold me on the bulkhead system for sure, as I was able to keep walking and paddling directly after the 'incident'.