Well, it is insanely fast

Took it out last Saturday minus the seat to check where I wanted to mount the seat.  The boat was modeled after a Blackhawk boat I once had that was relatively narrow with low primary stability and really fast.  Well, this one is that way too. I started kneeling in it and it started to feel pretty stable after an hour or so.   I mounted the seat pretty low (4"-5" drops) and went out Sunday again.  After I had a few hours in it, I felt pretty comfortable in it.  It tracks really straight.  It takes a little lean to convince it to turn reasonably quickly.  It isn't meant to be particularly maneuverable, but it is really fast.  I also found that it is actually fairly stable when paddled reasonably fast.  I've never paddled a boat before that had such a big stability difference between sitting still and moving at speed.
I built this to be a flat water exercise machine and it really couldn't be better for the purpose.  Really fast, really fun.