Beautiful apartment with loads of space and all the amenities you could want. Great for big groups or families. It's a little far from the major attractions so if you can, call a taxi. It's roughly 13€ each way to the Vatican or Colosseum.
Be warned that the air conditioner is a paid for service and that you should take it in summer as we got temperatures in excess of 36°C during the day and it never cooled much at night.