Really enjoyed our stay at Re Di Roma - extremely close to a metro station which made it really easy to get around Rome. The front desk staff were helpful, the room was clean and cleaned every day and it was an ideal base for sightseeing. The breakfast is the usual - but enough to satisfy you.
The area is residential and quiet - my only advice would be to take the fast train and the metro from the airport, rather than the regional/cheaper train - the cheaper train didn't have any signs as to what stop was coming up next, and then when we did get off it at Tuscolana (as per Re Di Roma's instructions on the website) we got quite lost in the area late at night in the dark. If we had caught the metro - we would have popped up on the exact street where the hotel is located and not have wandered around for 30minutes trying to find the place! It's not hard to find - but harder from Tuscolana station.
There are some really lovely restaurants around the area too - look on tripadvisor and get the front desk staff to pre-book for you.
Would highly recommend.