The hosts were lovely and quick to respond, provide information and recommendations. The location really cannot be beaten at all! Very central and close to the main attractions and great places to eat. We had a group of 9 adults, which was a bit of a squeeze but the hosts made it work for us.
There is a shuttle bus to FCO really close by too! +++
Things to be aware of, the apartment is in the basement of the building, so if you're out and about lots it shouldn't matter too much. There are also really good fake sun lamps in the windows which really feel like they're natural light. There is a single, large Jacuzzi that is in the en suite of the largest bedroom, there is no pool.
That said, the place is clean, comfortable and there's great amenities! You are guaranteed an awesome stay here!