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Thanks for the replies. I've done some research into safety and apparently they are prone to skidding and side winds, although wider wheels can help this. Should I get into an accident in one they score very well on the EruoNCAP crash test - a lot better than many bigger cars. The solid Tridion frame protects the driver and passender and the vinyl panels are designed to crumple to absorb impacts. bearing in mind that you take your live into your (and other drivers) hands every time you get into ANY car, I'm quite happy with the Smart's safety features.