Fantastic, loved the apartment, very clean, enough storage, good bedrooms up and down, eye to details including a local sim phone in case required for local usage, Carmen had a complimentary welcome bottle of wine and some soft drinks placed for us in the refrigerator , location was "perfect + perfect" as mentioned 7 mins walk to the Termini, peaceful area, couple of restaurant's around, feel very secured area to walk even during late evenings as there are few high profile offices in that area (did not enquire much). One improvement is to the shower as it is too thin/lacks pressure and guess I have seen similar reviews with other apartments in Rome, hence not sure it is with this one or common to Rome.
About our host Carmen, lovely host, always available, warm, excited to receive. She was there downstairs waiting for us with a big smile and welcoming arms, with all helpful tips documented well, pro-active messaging about the potential train strike before we landed, very responsive over emails & SMS. She made us feel home. Reaching apartment was easy as Carmen had sent step by step guide :).

Great experience, we as a family loved it and if we are back in Rome we will be at Carmen's Nel Cuore Di Roma apartment.