My son has one of these with a small outboard we take sometimes. The only drawback is that it's its own thing to attend to, to load, unload, etc.
Got another large 3D printer. Just about ready to start printing the one meter sail boat I mentioned. I'm also working on a couple of 3D printed planes.
I'm entering one of those in a CAD design contest. The prizes are desktop milling machines and more software to further feed the habit.