Excellent location near the Colosseum & a neatly-designed flat with an extremely comfortable bed. We spent very little time in the flat, which is on the first floor of a quiet residential building. It has air-conditioning so previous negative remarks about traffic noise don't really apply - we slept with the windows closed and it was fine; some noise from cars, refuse collectors etc driving down the paved road but nothing major.
The welcome from Swetlana was friendly & efficient.
Recommended eating places nearby (DO avoid the tourist traps right near the Colosseum) 2 traditional Italian family restaurants: I buoni amici (200m from San Giovanni Church) & La Taverna (300m from Colosseum, just up from Propaganda where the mixologist really knows his stuff - excellent & unusual cocktail list, atmospheric bar & mainly Italian customers so not too touristy, despite the location).