We had a great time and a great meal at this restaurant. They have a great outdoor seating area and the architecture of the restaurant is fantastic. I would recommend the carpaccio. Service was excellent and we will return.
In a pinch for take-away pizza it's okay, but the quality is not great and the staff can be a little rude abd the space a bit stuffy. Much better in my opinion is the Gatto osteria, around the corner.
Everything about this restaurant was fine, except for the pizza! It is a cozy space, our waiter was friendly and helpful, and we had a good salad and an excellent bottle of wine. The pizza, however, was severely undercooked - it needed about 10 more minutes in the pizza oven. The edges were edible, but the center was so undercooked that you could taste the flour in the dough. Maybe locals are getting pizza to take away because they can take it home and finish the cooking in their own ovens. So sorry I can't give is a good review, because it seems to be a nice space that is spoiled by uneven food quality.
This was our 3rd visit to Due Archi. Our first visit in February 2010 was perfect, our second time with family in October 2010 left the family divided, half really loved it and the other half despised it. We just returned from a visit to Siena in September 2015 and with much anticipation visited Due Archi on our first night (against our hotels advice, but we had been there before, so what could go wrong? We should have listened to the hotel). We sat down and between the two of us ordered wine, 2 salads and shared a pizza. After our order was placed, a father and 2 children sat down, obviously locals. They proceeded to each order, receive their meal, eat their meal and order dessert BEFORE our salad even showed up. We brought it to our waitress attention and she blurted out "its not my fault". Shortly later ONE salad showed up followed by a VERY burnt pizza. We managed to eat the burnt pizza and asked for our check. We were charged for 2 salads and when we questioned the waitress, she said "you ordered 2 salads". Yes we did, but she only served us one. After she placed blame to every other worker in the restaurant they changed our bill and we politely left....never to return. We should have known that after the bad experience a few years ago, and the hesitation from our hotel when we told them we were eating there, to try another restaurant. In summary, if headed to Siena, there are MANY other places to eat and receive a true Sienese experience. If you are local, you will be fine, but experience has shown, if you are an American, your experience will be less than pleasurable. I am sad to write this, but this is what happened, twice now from Due Archi.
The waiters here know almost all the guests and make them feel at home. It's a perfect place for lunch and dinner.