We stayed in Margot's apartment for 9 nights - a family with two teenage kids. The apartment is compact but very comfortable, exactly as you see in the photos. The wifi is good - which was important for the teens, and they could watch Netflix on tv. It was very hot while we were in Barcelona, so we made good use of the airconditioning.
Margot met us on arrival. The apartment is in a quiet residential area, but very close to shops, restaurants and the metro. She explained everything to us and gave us some recommendations for places to eat, where to get groceries. We also appreciated the supplies she had left - biscuits, yoghurt, coffee (lovely nespresso machine), melon, apple juice etc. The apartment is well equipped, and also has a dishwasher, washing machine and drier - though we didn't use all these.
The patio is very private and sheltered and is lovely to sit out for breakfast, lunch or in the evening.
It's about a 20 minute walk to Park Guell (book online) and about half an hour to Sagrada Familia. From the nearby metro stop (Lesseps) you can get to anywhere in the city very easily.
The beds are comfortable, with lovely linen sheets. There is a good supply of towels, toilet paper etc.
I highly recommend Margot's place as a home from home.