The apartment is very well placed if you want to visit Vatican city, and is very appropriate for six adults. It would be possible to use the two sofas in the dining room to accomodate two children, but not for two adults.
The neighbourhood is not noisy, and there is cafes and restaurants nearby. It is a very good option for staying at Rome.
Donatella answers promptly when you need something, and the minivan to travel from and to the airport she managed was perfect and cheaper than normal taxis.