Pros: This is a very unique building: a medieval structure with an interesting subterranean level. It's very nicely situated in the medieval quarter of Viterbo. Teresa was also very friendly, very prompt in responding to messages and giving parking instructions.
Cons: Since Teresa was out of town, a friend of hers let us in. He told us the air conditioning was not working, which was a concern considering Italy is in a heat wave! He brought us some fans, but we had to go after him and ask for toilet paper once we realized there was none. As soon as he left I messaged Teresa to ask about the AC and she told me it should work--which it did when we turned it on! I don't understand why the friend told us they were broken, but it was not a pleasant beginning to our stay.
Also, the description of the sleeping arrangements should be more appropriately described. There is 1 matrimonial bed, 2 bunkbeds (which were so flimsy the wooden slats of the bottom bunk actually popped out under the weight of a 150lb/68 kg person) and 2 couches, one in the kitchen and one in the salone. The bunkbeds and the bed are in one large bedroom, with a styrofoam "wall" between them. The flimsiness of the bunkbeds in particular was a problem--if our friend had been on the top bunk when the slats broke loose it could have been dangerous for the person on the bottom.
Finally, the wifi signal was very weak; only one of us could even get it to connect and then it was barely usable.