The apartment is located at the sixth floor, which you will take the lift to the fifth floor and walk up for one floor. It is not difficult to walk so it is fine. The apartment is pretty close to the shopping area yet it is still quiet at night which is what you need. It is walkable distance to Vatican so its perfect especially when you planned to visit Vatican on Sunday!
The apartment is clean and tidy, and have everything you need for a short stay.
The host is accommodating even we changed a few times for the check in time (sorry about that!) and the host is very prompt and responsive which is great.