I rented a Potomac 120 on the Oregon coast and paddled in the nature conservation area on the Siletz River estuary. I paddled for 3 hours and was quite comfortable for the first 2 1/2. It is a very basic boat, not overly heavy. The seat was very adequate. I had to pay attention to keep it going straight, but conversely, it would have been adequate in class 2 with a skirt. When I got back into the wind and paddled against it, it the water splashed quite a bit.
Definitely best as a quiet water boat unless equipped with a skirt. As a rec kayak, I would give it an 8, but as a touring kayak it would drop to a 6. Don't expect it to be more than it is.