We had a great stay at Paola's!!
The bed was very comfy, the location is great (Trastevere is perfect for restaurants and bars), we walked from the appartement to all the places we visited in Roma.
Also, we could check in early and that was perfect for us. Paola kept our bags nearby the last day, so we could keep walking around.
Only downside was the noise coming from the entrance of the building, just bring earplugs if that may be an issue for you.