I've got one of those plastic 250cc hondas!(suposed to be for the wife.) It's as comfortable and fuel efficient as it is dorky looking!
It'll pull me at 70 all day getting 60mpg. And it's so light It's easy to go all day without being beat at the end.
Handling is like being on one of those kiddie rides at the county fair. Really makes it hard to get exciting, until you take a curve at 70 and the frame begins to flex with the suspension motion! As my dad would describe it; "It's like hearding cats when you get into the corners!"