Look no more. Location is perfect - walking distance to all the major landmarks, 5 minutes from Pantheon, Navona etc. It's off the main road, so not too noisy at night, the kitchen is well equipped - you can cook for yourself there if you'd like (not recommended having places like Ivo a Trastevere nearby :)) ), the apartment has basically everything you need on vacation. Communication with Manuela is great, she replies very quickly, has a lot of tips on where to go, maps etc.
Definitely one of my favourite airbnbs so far.