We met our host within a few minutes of our arrival, he was very helpful getting us into the parking garage and up to the apartment. It was a very secure building keys or fobs required to move within the building once you were through the parking gates. Madrid is very busy, so having a nice place to relax was key to our trips positive outcome, about a 10 minute walk to the Metro or supermarket making getting around pretty simple. The Metro I would suggest is the best way to go down town to the city center, traffic is terrible and if you don't care about parking then drive there. The Hussle and bussle of the big city is what Madrid is about, but I would suggest visiting Toledo and Segovia while you are there, they are well worth the trip, history abounds and the towns are smaller and easier to navigate.
The apartment is a 2 bedroom 2 bathe unit, there is a sleeper sofa if you're good with that, A?C on the main floor, and in one of the upstairs bedrooms, but with the nice wall mounted fan the other bed room is livable, lower celling's upstairs so anyone over 6'4" may feel a bit cramp moving around, but it was described just as it is and we would stay there again anytime our travels take us back to Madrid. Hope you like round abouts Spain has them at almost every intersection. They do take some getting used to. Not far from the Apartment is a shopping mall, and Ikea store, the food court has a large selection of food types and tastes. Ikea is a trip and interesting to visit.