I am really impressed by the Diablos as they are so easy to set up for fishing and recreation. Wide open, too, for all sorts of customizations on seating, coolers, etc.
I actually like the fact that "kayaks" have pushed into several hybrid areas. We have:
1) the traditional kayaks;
2) the sit-on-tops with or without pedal drives;
3) some that are about half kayak/half canoe (NuCanoe comes to mind here);
4) and, the Diablo is a truly great example of blending a kayak with a SUP (stand up paddle) board.
I suppose there are even more types but this allows everyone to really find something they are attracted to. Personally, I'd rather have a Diablo than a SUP as it would be a super neat rig to push around with a pole back in shallow spots.