Great appartment per location and services included. It is near the Colisseum, Saint Giovanni de Laterano and close to Termini, so transport from/to the airport is not an issue.
The appartment has everything you might need.
However I would say it is more suitable for 4 people than 5 or 6, as the extra double bed is in the living room in front of the toilet. But this is nothing Pier Paolo could help, just an issue if you plan to be 3 couples.
In conclusion, I would recommend the place.