A great guesthouse in a brilliant location. You're very close to the Metro and its a nice walk over to the Vatican or Piazza Navona. There are good restaurants in the area, a grocery store and a few lively bars. It's also a great spot to go for a run in Villa Borghese (a big park).
The staff were friendly and always helpful and the guesthouse is well kept. It can be a little noisy during the day, but you're in Rome, its a busy city. It's quiet at night. It has free wifi and I had a good connection. You get a choice of Italian breakfasts and as I was there for a while, I changed my options a few times, with little fuss.
Overall, I was very satisfied and I would recommend it. Good value of money.