First off, this is an attractive food cart, and I love the fact that the workers wear chef jackets! Bonus points for that.
The pasta is delicious and simple. Everything is fresh and well-prepared. I found the pesto a little bland and too salty. The ragu, however, is pretty amazing, excellent short rib. The caramel that comes with the meal is a nice treat.
The portions are huge and filling, so it's good value for your dollar. Come hungry, or it's enough to share, or save for a second meal. It would be nice if they offered half portions.
Overall, a great addition to the food cart scene in Madison.