Nice airy apartment in a quiet spot away from the main road so a great retreat from the bustle of the city. I wasn't woken by noise once. Having the balconies to step out onto was great too. There are more convenient locations for all the historic sites but once you get your head around the transport it's fine and if you like walking even better ( it's a 10/15 min brisk walk to the river and around 30 mins to Trevi).
Our favourite eating spots were in Monti which was two stops on cheap mainline train from Roma Sant Pietro to Termini....then a few minutes walk so super convenient (make sure to eat at the Market restaurant in Termini station (URL HIDDEN) amazing with lots of choice and cool atmosphere). Monti has lots of nice restaurants from cosy to cool without the tourist vibe you you get around the historic sites.
My only criticism of apartment is that the shower in second ensuite was too small for me to use but would be fine for kids ( couldn't stop the curtain sticking to me !) but don't let that put you off...the other shower and bath were great.
Stefania was a lovely host who was easy to get hold of and very helpful.