First, the good. The place was amazing -- a castle-tower by the sea. What could be cooler? We had an amazing, unforgettable experience. The tower was very cleverly outfitted for 20th century living. It was attractive inside, and provided for almost everything you could need. (One word of warning: one must be comfortable with very steep steps.) Marco, our host, was so nice and pleasant, and responded immediately to fix the problems that we had.
But there were a few issues: 1) Our reception was a little rushed, so that we didn't have time to ask and get questions answered as soon as we arrived, and so Marco and Beatrice had to come back a couple of times that first night. Eventually everything was more or less worked out. 2) For the first night, we did not have internet, although Marco got us set up the next day. 3) A few kitchen issues made food preparation more difficult: we didn't have a way to light the stove the first night, and then when we got the lighter, it turned out that only one of the burners worked.
All in all, we had a great stay, the place is so special that it excuses most of the minor flaws, and Marco was really nice and helpful. I think with just a little adjustment, this would merit 5 stars.