Totally recommend it. I had a really pleasant stay at Giacomo's apartment and he was a great host.
The things I liked the most were that it's a modern and shiny new apartment, everything works perfectly, it's fully equipped, has a great wifi and is in a quiet location inside a nice neighborhood. Really good value for the money.
The location is very good, near Trastevere, and you have awesome views getting there and back because the neighborhood is located higher than Trastevere. I would have to point out though that the apartment is not very well communicated with Ciampino airport.
If I come back to Rome I'll try to book in Giacomo's apartment again!