We stayed in la Rotonda for 6 days and the only issue we had is that the time was too short. It really felt like leaving home.
The apartment was very clean, had everything you need and additionally some extras provided by the lovely host.
The house is in a very calm area and we were able to sleep until 10am with open windows without any problems. You can reach a lot of attractions by foot in a short time (there is a food market about 10 minutes away, the Colosseum 15 minutes, Termini about 30, Vatican is a bit further away and takes like 40-45 minutes).
The apartment had a nice temperature at all times (we were there in October) even though it is the top of the building. There is an AC unit in case it gets too hot which we did not need to use.
The bed is actually NOT a pull out couch. The couch has a bed frame in it and is extremely comfortable.
Communication with Martha was excellent.
When we reached out, we got a quick response everytime and she even asked us if we were alright after there had been riots in the city.
For our next Rome trip we will for sure come back to la Rotonda.