Awesome. I couldn't be happier with the Underground Kitchen. I don't go to too many new restaurants, but as a former Madisonian, I had to come up for this one.
Check this place out: it's now open in the old Cafe Montmartre and Sidecar location, but redesigned perfectly with an awesome Wisconsin cast iron decoration. The food is phenomenal. I recommend the veal tartare, the chicken, the tagliatelle, all of the desserts (especially the chocolate caramel torte)... everything really. Service is good, the proprietors/chefs are friendly, and the environment is homey and inviting.
Eat there now, and eat there often.