Stayed from 12-15th July 2008. I chose it because the price seemed reasonable, plus the reviews suggested a good location and reasonable place to stay. I have to agree, that it definitely scores well. The room was quite small, but this wasn't a problem for us. The air conditioning was essential, even for mid july, and it enabled a good nights' sleep and the ability to keep the windows closed, so cutting out any street noise (we were on the first floor facing the main street) and avoiding any insect bites...
Breakfast is a cold buffet, which is fine - but I didn't rate the coffee to highly.
As far as restaurants in the area are concerned, Pizzeria Roma is OK, Vito's seems a bit overpriced and definitely catering for tourists... Better off crossing the bridge and heading for Trattoria Buca di Ripetti, which is excellent, fairly priced, and catering more for trendy Romans rather than tourists. I have nothing against tourists, but the places that cater for them I feel are best avoided.

My girlfriend and I stayed at the Hotel Diplocatic for just over a week in early August of 2007 and had a great time. The room was decent size (comparable to any holiday inn room), had air conditioning, buffet breakfast was included, was quiet, and met all of our needs.

Great location just a few minutes walk to Castel Sant Angelo, other than that there is a bus stop 3 feet from the door, so it's simple to get anywhere in town. VERY good location.

Stayed 4 nights at this property in room 502. Room was adequete size, towels changed daily, sheets were not. Only one outlet, in the bathroom, to charge my camera and iPod. Irons are not allowed. Safe and mini frig in room. Breakfast consisted of a variety of pastries, juice, ham, salami, swiss cheese, cold cereal (but room temp milk....odd) yogurt. Staff brings coffee, but not all that quickly. Internet for guests was down the entire time we were there, and no one was quite sure where the nearest internet cafe was. Internet worked fine for the staff....

Front desk staff was very friendly and helpful. City buses and the 110 tour bus stop right outside the door. We were able to get all around the city very easily. We walked to the Vatican, the Spanish steps, and Piazza Navona. Bussed it to the Colosseum. The front desk was very helpful in telling us which bus would get us where. The restaurant next door (Proffesionalist?) was nice for coffee and pastries. The hotel staff recommends Vito's for dinner, but we prefered Clok, right across the street from the hotel.

Just returned from a trip to Rome with my sisters.We had adjacent rooms that were very clean and comfortable. Our rooms faced a very quiet street and we were not disturbed by any traffic noise. The breakfast was a cold buffet but there was ample choice and the staff were very friendly. This hotel is very convenient to all the great sights in Rome. We walked everywhere and felt very safe even at night. I will return to Rome again and I will definitely stay at the Diplomatic hotel again. We did not avail of the hotel taxi to the airport as this was 60 euro but we walked to taxi rank at end of road and taxi was only 40 euro .