First class location but can be a little hot.
What an amazing location, a short 2-20min walk to all the big sights. The best thing for us was the fabulous gelato shop underneath the apartment and the best bakery in town right next door, Roscioli. We saw many a foodie tour of Rome stopping in at both of these places! The fried fish shop reviewed by Anthony Bourdain is around the corner, the supermarket is 2 min walk and Campo de Fiori is also a 2 min walk. This made staying here amazing, you certainly felt like living like a local with all the choices for eating and drinking so at hand. We did not feel the need to cook in the very well equipped kitchen once.
The only downside to this apartment is the air conditioning, it was really ineffective. With the heat in summer, we were there in July, it is 36 degrees outside and it is was about 30 degrees inside. There are fans provided in the bedrooms which do help but be aware it is hot.
Overall our family of 4 were very comfortable here, if a little sweaty, but the superb location outweighed the heat.