The boat's in Pennsylvania, where my family has a cabin on a lake. So I use it about one weekend a year.
It's designed to be an open water boat, so it goes fast and straight. It's excellent on a lake or bay. It's a little hard to turn, so it would suck in a river. You have to lean to the side to lift the bottom out of the water and create a more round waterline to turn easily. Otherwise, it takes a good 30 seconds to make a turn using big sweeping strokes.
I like it. It's really fast.