We chose with my girlfriend to stay at the Pensione for 3 nights in October based on the several very good comments about the hospitality of the owners, the location of the hotel, the value for money of the rooms and of course the quirkyness of it all! And let me say that is all very true!
The most important of all for us was the owners. They are a mine of knowledge on Rome and tell you all about the other places you should visit in Rome, the other restaurants you should be having lunch or diner. More than being knowledgeable you understand very quickly when speaking with them that they love their city (which is fantastic!) and what they do.
As I said to Cinzio when we left, next time we are in Rome we stay at the Pensione.