Host: Jero was extremely welcoming and informative-- provided all required information for a comfortable stay. He waited until we arrived, showed us around the apartment. Provided map and information brochures.
Location: Convenient to train station. Walking distance to all central locations. Didn't need to use taxi. Crowded even around midnight. Touristy and safe with plenty of places to eat nearby.
Apartment: Small, cozy and clean, perfect for a couple. Is well equipped with Washer, dryer, oven & dishwasher. Kitchen has a tiny breakfast nook too. Due to the short stay over didn't get to use much of these amenities. These amenities make it perfect for a longer stay duration.
Building: Is about 1-2min walk from Grand Via station entrance. Has two double door entry. Comes with a elevator. Quiet residents.
Note: Bedding was a bit hard for what I'm used to.
Overall I would recommend this place to anyone who likes busy streets and is visiting Madrid.