I loved this flat. It was not a perfect, modern, charmless flat with every modern convenience, but was charming, quirky and comfortable, with nice antique furniture, tiled floors and exposed, high wooden ceiling. It felt Italian and Roman, and is in a phenomenal location. To open the window and find yourself staring at the side of the Pantheon's portico is awe-inspiring. I would choose to stay here again as it really immerses you in the city.
The temperature in Rome was around 32-34 degrees during our stay, and there was only a portable air conditioning unit in the bedroom, which meant that I, sleeping in the sitting room, had to have the windows open. The late night noise of tourist revellers and early morning bottle collections wouldn't suit everybody, but was fine for me as it reminded me just what a privilege the location is. I could have done without the new set of mosquito bites I acquired each morning, however.
The kitchenette is in the bedroom, but we never used it. It was well-stocked with tea, coffee, milk & other store cupboard basics, though I imagine most people will eat out.
The bathroom is compact but feels solid with Italian tiles on the floor and walls. The small cubicle shower works well.
The host, Rocco, was very helpful and accommodating. I would absolutely recommend this flat. It was one of those stays where I will remember the flat (for the right reasons), as well as the sights.