Marco and Giusi and wonderful people and will help make your visit to Mexico City better. If you are still challenged by Spanish, Marco and Giusi are both fluent in English and Italian (they teach Spanish to foreign students). This is their home. A 'departamento' as apartments are called in Spanish. They have the larger room and bathroom and your room will be the smaller one with your own bathroom across from the room. The kitchen and dining are shared areas. For me, two features that got a big thumbs up are: having a washing machine and having superb wi-fi.
I do think that this is a better option for one person due to the bed size. You will be pleased with how convenient the location is for public transportation, both the Line 1 Metrobus and the Chilpancingo metro stop. And you will be walking distance from the Parque Mexico. For me, because I love to walk, I didn't even consider Roma and Condesa far enough away not to walk to all the wonderful places such as Mercado Medellin, Mercado Roma, the coffee shops and restaurants in these two areas. You can find some online links by typing "best coffee in CDMX".
When you get your keys, be sure to have Marco show you the trick for opening the entrance to the building door to the building (you do a quarter turn, pull, then push to open). Also, the trick about not turning the shower handles too hard.