Great cockpit: comfortable seat and versatile seat-back (use as back band or backrest), twist-lock footpegs with wide footrests, and great thigh braces. Seals spray skirt size 1.7 is a perfect fit with the seat back in the back band position. Only have taken it out on flat water so far, and I can't wait to get it out on some big water and waves.
This craft is just short enough to take it on some rivers (though nothing where you'd need to turn on a dime), yet long enough to track straight and fast on still water. Excellent secondary stability. Very comfortable seat (as far as kayak seats go). Ample room for a backpacking tent and a few supplies for overnighting. It has a fairly open cockpit, yet can still be fitted with a skirt for rougher conditions. I am 6' 4" and 190 lbs and this feels perfect and has adjustable foot pegs (can also be fitted with a rudder).
I've taken it on many Ozark rivers and it usually performs well, just not if you have to do a last second correction since it wants to keep tracking straight). This kayak paddles perfectly down the Missouri River or on any open water. If you will be doing only sea kayaking you might look at the longer 17+ foot long cousins made by P&H.