I highly recommend Appartamento Roma centro and really appreciate Anna and her husband as a hosts ... we really felt like at home.
Communication with Anna was great before arrival and also in Roma.
Appartment is big enough for 6 - 7 people ... we appreciate to have separate rooms (each with own bathroom) but also one big room for being able to eat together ... and this appartment is really ideal place for 5 and more people. Kitchen is fully equipped, everything is nice and clean.
Location of appartment is perfect ... walking distance from Vatican, Piazza Popolo, Piazza Navona. Pretty close to metro station. And if you take bus 81 from bus stop nearby you can make "sightseeing tour" around Roma.
I hope I will return asap :)