Valeria's apartment is amazing. It is in a great location for all of the main sights, and the Colloseum is literally just outside the front door. We walked to most places and found most were within 20 minutes walk, however you also have the Metro and tram very close. There is also the Basilica Di San Clemente close by which is worth a look.
The apartment itself is comfortable, has lots of space and has everything you need. The terrace is a great bonus on a sunny day. There is a Carrefour close but we found that the Issimo a bit further down the same road as the Carrefour was much friendlier and also had much nicer bread.
There are so many great places to eat close by. We went to Hostaria I Clementini twice during our 5 say stay. The food was excellent and the service great too. There are several other recommendations in the apartment which are also great.
We had a great stay here. Next time we are in Rome we will be sure to stay here again.