I feel I can now give a half way descent review of the Supernova. I am a novice paddler and moved from a OT Discovery to the Supernova. Wow--what a difference. As to the initial stability--it doesn't have much, the boat likes to lean. With the rocker she also likes to turn. Suprisingly quick on the water and as long as you do your part a nice J stroke will keep her tracking straight. The secondary stability is amazing. I am just know getting a feel for what this boat can do. I have had her gunnel on one side seeping water and she will come right back up--simply amazing. I have watched good canoers in my boat and they can just make her dance. This is a high volume boat, so paddling in a strong cross wind on flatwater will take some effort, but it is doable. The load limit on the boat is stamped at 850lbs.
As to surfing--I am a novice and even I can get her up a wave. The boat will set there all day. This boat has made me become a better paddler. I am just now beginning to recognize the strength in the design.
Build quality--very good. I have the kevlar/fiberglass cap. The finish is very nice. The seat is comfortable, although from the factory it is too high without a load in the boat. The only thing I would complain about. The built in flotation chambers could have been made a bit bigger without sacrificing much space. Another 1 1/2" on each end would have provided a lot of extra flotation.