My partner and I just got back from a week in Rome (11/17-11/24), and had stayed at the Hotel Emona Aquaeductus. Overall, we found this to be a pleasant experience.
The room that we stayed in (26) had nice high ceilings and warm furnishings. It was pretty standard in size for a European hotel, the but the high ceilings made the space feel larger than it was. A few areas in the hotel could use a touch of plaster and fresh paint, but it didn't look run down at all. The walls were a bit on the thin side, so you may have a few issues in the morning if you have noisy neighbors. (But why are you sleeping anyway -- you are in Rome?) The street noise was very minimal. The bed itself was a bit firm, but I was fine with that and slept like the dead (although perhaps walking the city non-stop had something to do with that).
The bathroom was well-appointed as well, although the shower stall was on the small side, and the door was awkwardly placed by the toilet, so when you opened it, it would hit the bowl of the toilet. One's knees would hit the shower door as well while sitting on the toilet. It was definitely on the cozy side. They really should have scrapped the bidet to make more room.
The location was really convenient -- just a few minute walk from the Manzoni train station (along the A train, which heads through Termini towards Piazza di Spagna). There is a tobacco shop on the way (with a pleasant clerk), so you can buy transport tickets here if you don't have close to exact change (the machines in the stations limit the change back to 2 Euro).
The staff at the hotel really made the experience. They were all very friendly, and would greet you with a warm smile. The maid even changed out our bedspread on a daily basis, to give a bit of new design to the room (some of the bedspreads are quite vibrant and fun). When we found out that our departing flight took off too early to take the trains, they arranged a car for us (a new E-Class Mercedes, so not bad), so we were able to get to the airport stress-free in plenty of time.
The hotel had a breakfast daily as well -- mostly pastries, cereal, meat, cheese, juice, and coffee. It was more than enough to get us going each day.
Overall, I would say that this hotel exceeded my expectations. Sure, it wasn't perfect, but especially when you consider the cost, you will find this to be a spectacular value and cozy place to stay.