The apt is central, 10 mins from Pantheon, 15 from Spanish Steps, 10 from piazza del popolo, 15 from piazza navona. The host provided taxis to and from airport at 55 Euro, and provided details of local restaurants etc. in a binder full of information and was very quick to respond to communications throughout the booking.
Amenities are very good, fridge with freezer, dishwasher and washing machine, iron and board, working good air conditioning in all rooms, hot water when needed, very clean with plenty of storage, towels and some toiletries provided, TV and DVD player and the wifi never failed.
We went in August, hottest and busiest and it was great being able to pop back in when it got too hot and humid. The only downside was the noise at night as it is central, loud tipsy groups walking past from 11-3am, not continually but enough to wake you a few times each night (this could be the time of year) and the restaurant downstairs has a glass pickup at 6:50 each morning that will save you an alarm clock. Overall a really good holiday and a great place to stay.