Just returned from a great stay at this apartment. As others have mentioned there are a lot of steps but it's worth it for the wonderful view from the terrace. We enjoyed breakfast and drinks up there every day with views over to the vatican and central rome.
The location is great as it's so close to some really nice bars and restaurants, but quiet when it comes to bed time.
It was very hot during our visit and while fans were provided, it was a bit of an uncomfortable nights sleep but purely because of the heat, not the quality of the beds, which were comfy.
Check in was easy and Chiara responded super quick if we had any questions or problems.
We also enjoyed a meal cooked by Chiara up on the terrace which was lovely and a great way to spend our last evening in Rome.