I love the smart cars. The US seriously needs them here. They are much better than hybrids, in my humble opinion.
There's a video floating around on the web where a car show smashes one of them into a concrete wall at 50 or 60 miles an hour. The car performs beautifully, crumpling where it should, and preserving the integrity of the passenger compartment. The door even opens afterwards.
These are very good cars.