I say, let that thing pull out in front of me........... Everyone talks about gas mileage and amount of power they have (or should i say the power they dont have) but what about safety, You can fill with a roll cage for all i care and it still wont be a "safe" car. When a car is that lite, it will fly like a bird if it gets hit by a real car.
If You want economy, power, and safety, get an older car. I picked up an 1989 VW golf for an everyday beater, I rebuilt the engine, and now have enough power keep up with trafic (and then some) and I can get 30 - 40 mpg in city depending on how I drive it and even more on the highway. And the thing is safer then most cars, the darn thing wieghs about 3200 pounds. It has more steel then some full frame cars.
And as far as money into it, I have put less then $2000.00 into the car. Counting all the general repairs over the 4 years i have had the car, like brakes, oil changes, etc.