We stayed here 4 days-3 nights.
Our host was really nice, he told us everything, how to use and where to go.
The apartment was a bit messy. The main problem was the shower. It has it's own mind and we had warm water when it wanted.
The apartment itself was cold, but thanks to the airconditioner, the temperature was good.
I forgot to mention, that we needed minimum 3 blankets, because me and my boyfriend can share one, but his brother and his mother had to use one together. That was a bit unconfortable for them.
Anyways, the apartment was good. We didn't spent so much time there, just slept.
It is close to the Vatican, bars, restaurants, shops.
I recommend it, but be careful with the shower.