@cloudel – Cathedral hull boats are not bad at all in the right conditions. I often go out on the river with my dad in this type of boat, and as long as there are no rapids, it is a pretty calm ride.
It actually feels like the whole boat is floating above the water. This is a considerable feat, because the river is often only about a foot deep in places. We have never gotten stuck in the mud in this boat, though I can't say the same for our other boats.
If you are just wanting to float downstream or drift around in a pond, this is a great type of boat to have. It wasn't designed for use in water with big waves, and you can blame your bad experience on your friends rather than the cathedral hull.