We stayed one night in the annex room and were very disappointed. The annex is severly in need of a FULL renovation. Old bed covers , miniscule closet bathroom, musty and dusty. Very noisy, even in early Dec. Bed unconfirtable , hard and sqeeky.The view of the Pantheon was great but coulld not make up for the negatives. The front desk receptionist Luigi was arrogant and unhelpful. The breakfast was adequate and the breakfast lady very nice and sweet.I can not see how this can be a 4 star hotel. I can not recommend this hotel.

Stayed here for 3 nights - we had a good view of the Pantheon if we leaned out of the window, otherwise we looked across the Piazza. The piazza is really buzzing, great in Nov. but would be noisy in the summer if you wanted the windows open. The room was v. pleasant but we found the beds hard & the bathroom small, but the breakfasts were excellent - little bowls of fruit salad, scrambled eggs & pancetta on toast, peaches & fresh yoghurt, baked apples with muesli & cinamon, all served in an open-air courtyard in the middle of the hotel (even in November). because of an awning & patio heaters. Although the location is great, it is quite a way from the nearest metro - not a problem if the weather's good or you like walking. We would stay here again because of the location.
We found a great day out of Rome - take the train from termini to Castel Gandolfo, the Pope's summer residence overlooking a huge lake. which is in the crater of a defunct volcano. Next door is a great restaurant, Pagnanelli's, where if you contact them, they will arrange a wine-tasting & give you a tour of the cellars - fantastic.

The hotel overlooks the pantheon - one of the best preserved sites in Rome.
Hotel is lovely - good service & nice rooms.
Breakfast isn't great but sufficient - cold continental food only.
Would definately return.

My wife did the tour of Italy on our honeymoon, starting in Venice, going to Florence, then Rome, then Positano. This was the only really disappointing hotel. We stayed just one night. The rooms were dark, musty, and the bathroom smelled mildewy. We asked for a better room, but were told it was the best one. I have to confess that you can see the Pantheon from the window, but that is the only saving grace. It amazes me that this place is featured in so many design hotel books and articles. Needs a serious overhaul.