After booking Luca's place, we quickly received a very informative email on how to get to the apartment, including all the relevant tips on avoiding fake expensive taxis etc.
When we actually got there, Nicole and Luca invited us for some drinks and we talked for quite some time about Rome, Italy and life. After the conversation, we were well equipped win all the knowledge we could need to fully enjoy our Roman experience.
Regarding the place itself: Awesome! Secure, clean, comfortable. Great heating, hot water all the time, just perfect.
To conclude, if the place is available, book it!