The apartment is great. The location is quiet and nice. There's a supermarket and pharmacy nearby for all your immediate travelling needs.
It can seem a little intimidating at first to reach the place using public transport, but the system is easy to figure out. It takes a while to reach the centre (approximately an hour) from the apartment, but in return you'll stay in a safe and quiet part of the city.
The apartment is spacious and has everything you need for a good stay. The shower space is large, the bed is comfortable and the kitchen has all the tools for cooking. Plus, there's a large fridge with an ice-machine.
The communication was very easy and whenever I needed some local tips (e.g. where the nearest ATM is or a newsstand/kiosk for buying tickets), I always got a quick response.
In addition to a spacious apartment, you also have the option to take advantage of the airport transfer option, either getting to the apartment or to the airport. I used the transfer to get back to FCO and it made the tailend of my trip very comfortable and stress free.
I wanted to say a special thanks to Olga for being so friendly! This apartment is definitely worth booking!