I knew this place was going to be in central rome near the pantheon, because of the reviews I had read on Trip Advisor, but it is LITERALLY 50 ft from the Pantheon, right in that square, you can just tumble out of your door right into all the action. it's a great location, you can walk everywhere, which we did: coliseum, vatican, trevi fountain, spanish steps, villa borghese...all within walking distance...which is good because taxis are expensive in Rome. Also, 2 of the best cafes are stone's throw away + my favorite gelato place just a couple blocks away. The service was very friendly and helpful and the rooms were very comfortable, and there was satellite TV, so it was nice to watch something in english besides BBC world when you wanted to relax in the room a bit for a break. they also had champagne waiting in our room on my birthday. Neither my husband nor I told them it was my birthday, so that was a nice thoughtful touch, they must have noticed it when they made copies of our passports (which all hotels do upon check-in). Complimentary breakfast every morning (or rather it's included in your room charge). they have a roof bar which gives a great view of the Piazza della Rotunda below as well as of Rome. Rooms were very clean, it was a very nice hotel, money well spent. We would definitely stay here again! Only thing that might be nice in Rome in summer would be to have a pool because it was so hot!

Great, great hotel. From top to bottom. Unbeatable location, excellent staff. I would never stay anywhere else while in Rome.

As others have said earlier, the location of this hotel is unbeatable. It is situated within a 30 minute walk (or short bus/cab ride) to all the major Rome attractions, including the Forum/Colosseum, The Vatican, Trevi Fountain, Spanish Steps, etc. As you walk out the front door of the hotel you are literally steps from the front of the Pantheon, and the vibrant Piazza Pantheon, which bustles with life especially on Friday/Saturday evenings (makes it pretty convenient to grab an espresso, relax listening to various street acts, and then literally walk less than 60 seconds to get to the hotel.
The service at the hotel is also excellent, particularly Mauro and Alessandra at the front desk, both of whom were helpful and very friendly.
The hotel features a lovely rooftop bar that offers a nice view and allows one to experience light breezes, which is often a relief from hot, summer days.
My biggest beef with the hotel was the size of the rooms. We had a so-called triple for my wife, son (9) and I, and we were crammed in. We couldn't even get a chair to fit for the desk , since it left no room to walk past it on the way to the bathroom. The air conditioning vents leaked (and could not be fixed) and the front desk must make changes to the temperature for you if it's more than a degree change from what you want.
The floors were pretty dirty in the room, even after the housekeeping staff cleaned it.

While these latter comments were my negatives, it should not detract one from coming here. It is a great hotel, driven by its location.

Spent 4 nights at the Senato in mid-June. Based on Tripadvisor comments I had high expectations, and was not disappointed. The location is excellent, right on the Piazza Rotunda, and athough our room (108) was located toward the front of the hotel, noise from the square was never a problem. The room was on the small side, but average for Italy, and spotlessly clean. My single complaint would be that the mattress was very hard. The bathroom was generously sized with a combo bath/shower and water pressure was excellent. Breakfast is served in a beautiful room, with hot and cold selections. We enjoyed drinks on the roof-top bar ieach evening. There is a taxi stand right across the square and a very nice market down the side street to the left of the McDonald's. Staff were very helpful and assisted us with dinner reservations. We would absolutely stay again in a heartbeat.