Wife and I are both 41. We have 3 kids, but use the smart a lot to shuffle them around. They usually have separate school functions, baseball practice, etc. Also great for quick midweek runs to the grocery store.
We have 3 other vehicles ( Impala 9c1, Caravan, and Mercedes C320 ) for when we all have to go somewhere, but the smart is happily getting the most miles of late...

Brian