The 12 foot, Blackhawk Shadow is best used by someone in the 125 to 150 pound weight range.
Ideally, in my opinion, it is best used by a paddler sitting on a saddle, or sitting on a portable seat (ala pack boat) in the bilge.
Body weight needs to be kept below the gunwales, and you need to "keep your head in the boat".
It has very little initial stability, and not much secondary stability.
A paddler will few skills will spend about as much time in the water as they do in the boat.
It is somewhat of a challenge to a skilled paddler, until they have some seat time.
I own 2 of them. One is show in garage on sawhorse. Both of themI own are shown hanging in storage shed with a Blackhawk Nighthawk(with saddle)
Joker 1942