This is a nice touring kayak for the intermediate paddler. It has a comfortable and adjustable high back seat. It tracks pretty straight and a rudder is included for even better tracking. I tried a P2 medium volume boat. At 5'10" I found the deck to be a little low when getting in or out of the cockpit. The thigh braces wrap over the top of your knees to keep them where they should be. I tested this boat out by putting it up on edge and performing a few rolls with it. Because this boat is designed more for comfort, it might not be the ideal choice for that. The seat is a little roomy for that kind of thing, though hip pads would fix that. The high seat back limits movement desired for advanced skills. The bottom of the seat back fits into a slot, and on one roll, it popped loose. In short, the Epsilon is a nice comfortable sea kayak for most paddlers. For more advanced paddlers who aren't all that concerned about comfort and regularly like to test their skills, Boreal makes the Baffin for that.
I have been out in calm conditions and paddled through 3 to 4 foot confused waves on Lake Ontario. This is a very stable boat, tracks very well without the rudder, edges nicely, and cruises along with very little effort. If the rudder is down it will handle high winds and track straight and true.
I am 64 years old 5'10" and 200 pounds and the boat fits like a glove. I cruise easily at about 4 - 4.5 mph for 15 - 20 miles with no back pain or discomfort! To me that says a lot. Excellent boat that I will never sell.