The place was comfortable -- 2 big bedrooms and 2 bathrooms are wonderful. Just make sure to pin down checkin arrangements before you arrive -- we had to make a couple calls and wait outside the apartment before Giovanni came to meet us.
It's very close to the metro and, of course, the Colosseum and Forum, but we really walked most places; top attractions are all pretty much a 15-30 minute walk.
We ended up without WiFi for half our stay as they decided to switch providers while we were there, but that's unlikely to happen to you and Giovanni did the best he could to get us back online.
Would definitely stay there again and recommend it.