I'm with 'Dub, I took a vacation in Puerto Rico a few years ago and rented a VW Thing for the weekend while on the island of Culebra (tiny island off the eastern coast of Puerto Rico). What a blast! There's absolutely nothing to the vehicle, your average go-cart is probably more sophisticated, but you just had to love the charm of something so incredibly simple and odd at the same time.

No bus for me, but I'd take a Thing any day (not over the VX of course though).