Positives:
This is absolutely the best place I've stayed in, better than any hotel or other apartment.
The apartment is beautiful, very nicely furnished and clean. Very airy and big.
Located in a safe, really good area, very close to a metro station. There is also a great cafe next door.
The owner was fantastic, very attentive and helpful.
Wi-Fi works great and the flat was well stocked with amenities, e.g. toilet rolls and soap.
Air-con worked really well and was a great addition to the flat.
Apart from being in a great location safety wise, the apartment is a 10 minute walk from Vatican City and the Vatican Museums.
I'd recommend this flat to anyone, it is suited to couples or families, very versatile.
Negatives:
Nothing