The apartment it's amazing, it's like a hotel suite with private terrace (quite big terrace!).
It's in the very center, you can walk everywhere within 20-30 min maximum! we didn't need to take the metro not even one day! It's located next to Campo di Fiori, one of the most vibtrant areas of Rome.
The communication with Emma was always very smooth, and upon our arrival she came to pick us up at the tram station, such a detail. She gave us some recommendations of places arround the appartment.
The apartment has a vintage style that is very nice. The bed was comfortable. The terrace is the best! you can have breakfast there, and also a glass of wine in the evening... super super!
The only thing is not so nice is the bathroom, specially the shower, which is super super small that make it uncomfortable to have a shower. But you survive to it ;)
Also, it has no elevator (5 floors up), but for me, that I'm young, was not a problem at all.
I strongly recommend Emma's appartment.