Pros: Anna was a very responsive and helpful host. She responded to questions quickly and gave us good advice upon arrival. The apartment location is very convenient. It is close to many spots (quick to piazza navona, pantheon) but is far enough away from the really touristy areas. There is a small kitchen and we made breakfast in the morning which was convenient and cost effective. The price of this apartment is low.
Cons: The mattress is bad -you can feel and hear the springs. The 1 pillow per person was bad. The place is small. The bathroom is really small -it was hard to sit on the toilet and not hit your knees and the toilet seat slipped off to each side. The shower is small and it's difficult to move in there. You can hear a lot of noise from outside and from the neighbors.
So it's great if you want a place to crash in Rome for a couple days, but if you are staying for several days and want something with a bit more comfort you'd probably want somewhere else.