Amazing super central location in a comfortable apartment.
I mistakenly thought we were in same square as Pantheon but it's actually a few minutes' walk away (the view out of the window is Hadrian's temple). The stairs to the top bedroom are narrow - fine for our kids but trickier for adults. The kitchen is very small - think you'd struggle to cook a proper family meal in there, though you could in theory. The hob/shower also need fixing. But these are small points.
Overall it was exactly what we needed for our week in Rome - the location couldn't be better and the flat has (almost) everything you need. The host kindly arranged private taxi from the airport. Also thankful for the TV with Netflix when our legs needed some downtime!