I think the only reason people in the US won't buy the smart is because of it's small size. Somehow they think bigger = Safer. It's the design of the car that mostly determines how safe a car is. But because everything in the US is getting bigger (have you noticed that every new generation of cars is a few inches larger the the last). Every car manufuacturer in the us is trying to be the "safest" by being the biggest. The Smart has a full metal roll cage to protect the passengers.
Here is a video showing it in action(extreme testing).
I think using 4000+ pounds of metal to transport a 100-200 pound human to and from work is a bit wasteful unless needed. The Smart is meant to be a city/commute car with a few long trips thrown in. The Smart is selling well in Europe because people have don't need bigger cars, and gas is much more expensive there.
I don't hate SUVs or Trucks, but I think there are just too many of them then needed. From what I've seen around where I live, many people don't need to carry heavy loads for work or for pleasure.
I read this interesting artical about the Smart car on Popular Science, two people drove the car over 1500 miles in the US in one week. Total gas price was $ 80.92 and total gallons of gas was 40.42 gallons with a lead foot driver.
Quote:I wouldn't want to get hit by a Hummer or another big truck/car while driving that thing
That's the reason why it won't sell well, most americans have the idea that larger + heavier = safer (that is probably the reason they are making the Smart larger and more gas guzzling for the US market). Yes it might be true, but you pay in gas prices , and a well designed car can just as tough and light at the same time.
The Smart should be between $15000 and $11000