The communication was pretty good, except I asked in a couple of texts, if it was possible to park the car (as we had luggages and were not sure if to give the car back to Avis first or leave the bags first). The answer was that "it was possible". So we put the address in our GMaps and headed towards the aptm. While driving we realized we entered a car-restricted zone (allowed only to residents with permit). We were driving oneway super narrow streets full of tourists and restaurants with tables and chairs (one had to move the chair in to let us pass). A nightmare!
We parked in front of a shop and the shop assistant came out saying we couldn't park there and started to make a phone call. I asked to wait 5 mins.
We got there nervous and not knowing how to get back and the girl that gave us the keys said she was sorry that David didn't tell us we were not allowed to drive there... We went back in reverse and made it back. So, Do not drive there!
Great spot near Piazza Navona, perfect to visit anything. Just walk (or taxi). The apartment is nice, clean, spacious. The bed I slept in (main) was comfortable. The only thing is that they noise at night (from restaurants and nearby streets) was annoying -till 3am. Just bring earplugs, but I've heard it's like that in fancy hotel in the center too.
We go there at 12pm and it still had to be cleaned. No problem, we just needed to leave the bags. Also, we had been in other places and check in was much later, so all good. When we came back it was perfectly clean.
In all, good price for a nice place in a great area.