I would definitely recommend the place (actually part of villa!) for big family or a group! it has enough space, 2 toilets, 4 small but cosy rooms, kitchen. We were in November, so couldn't enjoy the garden fully, bet yes - it looks a great space for breakfast or evening wine :) Everything was very clean. Kitchen is equipped even with more than needed ))
Neighbourhood is residential, very safe, with villas and locals leaving. You need to go 10-15 mins till transport, note that there are hills. Tram would be the best option as it takes you to Trastevere Center, or city center, and is more regular. There is also the bus (bus stop is closer). So there is a big choice depending on where you need to go. For dinner we went to Trastevere (train) or city center. There is a big and good shop 10 mins up to the hill (CONAD) - I would recommend.
Big ADVANTAGE - from airport you reach directly Trastevere station (10-15 mins) and it is easier and cheaper than to Termini (8 euros). Also you can agree to leave luggage on your last day in the room (big THANKS for it) saving on time and luggage room.
Please note additional payments (tax and linen).
Highly recommended and enjoy! :)