Hubby and I stayed here for 2 nights at the end of a trip to Amalfi Coast and Capri.
LOCATION. The location is absolutely unbeatable--10 min walk to Pantheon, 5 mins to Piazza Navona or Campo dei Fiori or Trastevere, 15 mins walk to Forum/Colosseum. Supermarket right next door for snacks, wine, cold water, and goodies to take home! It IS a lovely oasis--cool and quiet, with an attractive courtyard.
ROOM. But for E240 a night, the most expensive place we stayed in by almost 100 Euros, we were disappointed in our room. Everything was luxurious, but the room was so tiny there was barely enough room to walk around the bed without turning sideways (we're average sized people, BTW). The bathroom was all marble and very luxe, but I literally (though we decided not to take a photo of this) sat on the toilet with one foot well into the shower, the other foot on the sink, and my knee in the bidet. Seriously.
When we checked in, the attendant said he was giving us a room with a lovely courtyard view. We had a balcony, but it was the roof of the building below, separated with iron railing between four rooms--and one of the balconies ran the length of the others, blocking the other three rooms from having a view of anything other than some attractive rooftops and windows. And water poured down from the rooftop onto the balcony next to ours--though there was no rain--kinda wierd. Also, starting at 7 am on Sunday morning, the maid was vacuuming the hallway and moving furniture overhead loudly enough to wake up my hubby, who sleeps like the dead. He even called to complain.
VALUE. Our traveling companions stayed near the train station at a hotel E100 cheaper that wasn't as luxurious, and not the same location, but the room was comfortable and sounded about the same size as ours. It's up to you as to how important location is: if I could find a lesser priced hotel in this same area, I'd stay there in a heartbeat. We only had one full day in Rome, and wanted to maximize our time by staying in a central location.
FOOD. The breakfast was enormous--yogurt, eggs, sausage, fruit, cappuccino/espresso to order, etc, etc. Very nice quality. Ate at L'Insalata Ricca (a Roman chain)--great selection and really good food--and super cheap! Also ate at Sacro e Profano, in a converted church near Trevi Fountain--excellent. And I highly recommend the olives at the supermarket next door.