I stayed in Laura & Juan's place for two weeks. Apartment was very clean, quiet, had amazing balcony where we regularly had our breakfast. Bed was very comfy and I really liked the shower.
Apartment is equipped with all necessary amenities like washing machine, microwave and dishwasher. But what we missed was vacuum cleaner - it would have been easier for us to keep apartment clean if we had it. There were no dishwasher liquid, tablets for dishwasher or detergent for washing machine so we had to buy it. It was not a problem at all as there are many shops around.
I really liked the location which might not be very central but still very convenient. Only 5 min walk to the nearest metro station and 25 minutes walk to Plaza Mayor. If you travel from Barajas T4 and don't want to take a taxi, cercanias line C1 or C10 to Delicias is the best option and way better than metro. I would definitely recommend this place for single traveller or couple.