First of all I'm 5'7" tall 170lbs and the Trans Am SS fits perfectly with room to spare. I've paddled this boat exclusively over the last 4 months going out at least 2 times a week in a wide variety of conditions from dead flat calm to 35mph winds and very rough waters around Long Island, NY. The high rocker profile makes the boat wander a bit in flat water but when it gets rough out this boat is an absolute blast to paddle. Despite how narrow it is, it's very comfortable and feels at home in waves. The rougher it gets the faster this boat goes.
I recently entered a race and with the Trans Am SS and my Greenland paddle I was able to finish in second place right behind a Rockpool Alaw Bach using a euro blade. The Trans Am SS is also a great boat to roll as well, the high rocker and low decks make rolling easy. Additionally, it's incredibly easy to get on edge and hold it there as you paddle.
Overall, for the conditions I typically paddle in (windy and choppy) I couldn't be any happier with the Trans Am SS. When it's flat out the boat can wander a bit but it's easily handled. Last but not least, it's a great looking kayak. If you can get your hands on one I highly recommend trying it out.