What I liked
It's sort of a lazy old town... yes there are tourists, the center is busy with them to the point of unable to move; but at the same time it has a quiet feel about it, a Mediterranean laziness, that feeling that maybe you have stepped out of time and there is no rush to go or do anything. Siena is great for a one day trip if you don’t have more time (but if you do – take it:))
What I didn't like
Cars in the old town... couldn't get it: it's a small town - do you really need to take a car through the very center of it (these were tourists i must say)