I have subjected this boat to a range of conditions (open water, choppy larger northern Ontario lakes, creeks, milder whitewater rivers) and have no complaints, other than that on it's first, relatively 'gentle' trip the Trylon material under the seat developed non-leaking radial cracks in the hull. This doesn't seem to be a problem (yet) and doesn't affect performance, but it is something that I will have to watch over time to see how 'durable' the Trylon really is, and how much I can expect of it (Note: a friend bought a Santee XL at the same time as me, and she has had no problem with this). Performance on all conditions was excellent - in spite of the 'recreational' tag, tracking is great, handling in current and smaller rapids fine, a joy to paddle.
The Santee rates a 10/10 for paddling performance and style, but it is the Hurricane company that brings down the rating (under a separate rating system for companies, they would get a failing grade!!!) All questions regarding the hull cracks (is this a concern over time or not, whether or not to treat them, limit of Trylon for various whitewater/rocky conditions etc) as well as attempts to replace a hatch cover that blow off and was lost, have been IGNORED...have been paddling canoes and kayaks for many years and have never run into such poor, poor service. Luckily, Swift has been a bit more helpful, although they seem to have an absence of product information from the Hurricane people, as well.
However, as for the Santee itself - I TOTALLY recommend this boat. Even my kids, who were never canoe fans, have taken to this kayak and are finally enjoying paddling - would love to get another as a second boat.