Slingshot boards and boots?

Ok, I have heard a little about them befor but have never seen untill the other day. Rocklin Watersports has three in, 2 recoils and 1 response. I set up the response with the Driver boot and without the fins on, got in and was impressed about the flex in the board! The comfort level was nice as well. I want to hear from people who ride these boards, are they loose on the water? are they comfy while on a long set? Suprised about such a flat ride surface on the boards.