If I'm putzing around then I drive with sandals on but if it's a long trip the lack of support makes my leg go dead. It's fine except heel-toe downshifts are kind of tricky with a sandal floppin around down there. Luckily since my car has nicely placed pedals I can still pull it off alright. I tried barefoot once or twice and didn't particularly like it.

When I was in highschool my dad would yell at me if I tried to walk out the front door in the morning with sandals on and drive to school. In fact, when I went to go get me a pair of Birkenstocks, he said the only way he would let me drive with them is if I got the kind with the strap on the back. I really wanted the kind with no strap on the back, but if it was gonna save me from gettin hassled every day about my footwear, it was worth it.