Question about Burgman 400 (JT Rock might know something about this)

I've been thinking about getting a Suzuki Burgman 400. It's sort of like a mix between a motorcycle and a motored scooter. The reason I want one is for gas mileage.

What kind of gas mileage would it get if most of my miles were road miles (at 55 mph.)? Also, being as I'm 6'3" tall (though rather skinny), would it be big enough for me? And last but not least, provided we take care of it, will it be good about staying out of the shop and whatnot? (Not always tearing up, etc.)?