Paolo was a terrific host, our flight was delayed and we ended up not getting to his place till 1am! location is great, your right in Monti. Close to everything basically, good food, shopping, Transit.
The apartment is 6 flights of stairs up with no elevator. So if you have heavy bags or aren't really physically fit it might be a big issue. I'm 34 and in relatively good shape and I found it extremely challenging.
The ceilings are sloped and since you are right under the roof, you have to watch your head. Also, because of the orientation of the sloping roof and shower placement it's very hard to shower without getting water all over the bathroom floor.
The bedroom has two single worn spring mattresses put together which are okay to sleep on, but unfortunately a nest of birds seems to have made there home on the roof right outside your bedroom window and they don't shut up all night. made it very hard to sleep.