I stayed in Herve's apartment with my mom and dad. They took the bedroom and i slept on the couch which was surprisingly very comfortable. The whole apartment was very clean, the sheets were nice and warm, we appreciated the water and some beers in the fridge and there was nice coffee and tea as well. The kitchen was well equipped so we could prepare nice breakfasts. Also there were nice towels offered and shampoo and shower gel in the bathroom. All in all better than a hotel in Rome I think.
The communication with Herve and Laura was very easy, Laura was waiting for us already when we got there from the airport and also helped us with getting around and ordering a taxi.
The location I think is super cool, just a few steps from the Vatican museum. It is also easy to find as you just follow the Vatican wall. There is metro but we hardly used it, we rather walked as by crossing St Peters square towards the Angels palace and the bridge you can enjoy a scenic walk and everything what Rome has to offer. So we usually walked all the way to the historic sights like the Pantheon, Spanish steps etc. Takes you 30 minutes the most and on the way there are plenty of restaurants and coffee places.