Small ground floor apartment in a nice neighbourhood. The neighbourhood is quite poorly connected to the centre (you have to take a bus, which is not very reliable), but it is not a problem if you don't mind walking. The neighbourhood itself is very nice with lots of restaurants and bars - it's much more of the real Rome than you'll get elsewhere. I would recommend taking a taxi from the airport or Termini if you have suitcases as the bus/metro is uncomfortable.
The apartment itself is on the small side and feels a bit cramped, so would not be great for longer stays. The bed was very comfortable and the kitchen had enough for very basic cooking. The main downside is the bathroom as there is sensitive plumbing and the shower doesn't work too well. Overall the apartment is fine for what you're paying for it, but it's certainly not luxury.