Even though we didn't meet our host, communication with Patrizio was easy and painless. Check in instructions were clear.
The apartment is a walking distance from Termini; however, if you are arriving after dark, I recommend taking the metro or a taxi. The walk between the train station and the apartment is a rather disappointing first impression of Rome.
There was no AC in the room, so we walked into a very stuffy room but the sealing fan was able to improve the situation quickly.
The queen size bed was actually two twin beds pushed together, which was a bit odd but still comfortable enough.