This place's location is ABSOLUTELY great ! Midway between Piazza di Spagna and Fontana di Trevi.
It has 3 rooms with double beds so it can acommodate 3 couples. Each room has its own private bathroom. Beware that one of the room is accessible by very steep stairs.
The only things that lacked were maybe : a kettle and a microwave for breakfast. But really no big deal. And there is a nespresso. You're in Italy, not in the UK !
Gabrielle was very kind and contacted me as soon as I booked. He provided me with every useful information. Checkout is at 12:00 so if your plane leaves late you can enjoy one more morning.
In a word : perfect.