Yeah, um. I wouldn't exactly list any kind of exercise, low impact or other, as a plus. Not the "always be prepared to go in the water". I actually want the boat so that I DON'T end up in the water. (big boat) And I'm fully willing to burn fuel in return for effortless movement. (big boat with a motor)
The youtube that scared hell out of me was the one where he...ends up in the water, then climbs back on, only to roll it again. And this is in freaking Australia where I'm pretty sure such things always end up with the person seeing the insides of a great white. In fact, I don't know a single person who has fallen off a kayak in Australian waters that didn't end up eaten by a shark.*
The real appeal to me of a pedal boat is:
1) Very hard to fall out of. So hard that they are widely used as rental craft in places where idiots, drunks, and kids make up the vast bulk of the clientele. most boats are very hard to fall out of, you don't fall out of a kayak or drift boat or small aluminum boat...the boat gets flipped over and you are in the water...I think you want a big boat
2) No rowing. pedaling an inefficient drive boat is more work than rowing a drift boat/paddling a kayak/canoe.../pedaling a Mirage Drive Hobie...
3) Well nigh unsinkable in calm water. unsinkable or unflippable? all the boats being discussed are unsinkable; all boats can be flipped.
4) No rowing. see 2.
5) Unlike a kayak, cannot possibly be mistaken for a seal by even the most myopic shark or orca. I didn't know you were planning to go into the ocean...a good question might be which of the boats being discussed is suitable for use in the ocean?
6) No rowing. see 2.