Great location a block from the Trevi fountain. We were able to amble over early (7am) and enjoy the fountain before it got crazy busy ( the rest of the day and into late evenings). A bit noisy at night but didn't affect our sleep -- city folks won't notice it.
The AC was nice and cold and the beds were very comfortable. The bathrooms were very modern. The kitchen is quite small and there really is little space for gathering together for our group of 9 (4 adults and 5 children). But you're in the heart of Rome, so why stay home?
We did have to check in at Hotel Forty-Seven and the taxi ourselves and our luggage to the apartment about 5-10 minutes away -- too far to walk with 4 adults, 5 children and all of our luggge.
Our host Enrica was very helpful and graciously smoothed over a few rough edges -- she and her colleague personally attended to a bathroom cleanliness situation very quickly. Also, the washing machine had been broken recently and the parts were on order. Enrica personally collected our laundry and had it cleaned and delivered back the next day for free.
So this was a great place for a short stay in the heart of Rome, and great support from Hotel Forty-seven.