This is an amazing place located in a perfect location near the Spanish steps. We visited here with 2 couples and a child and there was plenty of room for all of us.
The place has a beautiful little courtyard which we generally used in the mornings to drink our coffee and listen to the music school (one of the highlights). It has 3 bathrooms with toilets; although the one in the "kids" room is really only usable as a bathroom (not a problem for us).
The only thing that could have been better for us would have been if the room with 2 single beds was a double bed instead (didn't matter - we dealt with it). The beds were all very comfortable as were the pillows. There was also plenty of bedding, towels etc.
Really can't fault this place if you want to spend a few days in Rome.