The apartment is exactly as shown in the pictures. It's very clean and well-kept. The bed is huge and very comfortable. There are all the necessary household items we needed (such as: washing machine, hairdryer, iron, ironing board, clothes airer, vacuum cleaner, mop etc.) It's very important especially if you plan to stay there for a longer time.
We were very surprised that wifi worked so excellent, even on the terrace or outside the apartment (when we're waiting for a lift)! Thanks to that, I could send all my photos and videos to my OneDrive disc or share it with the family and friends.
Another nice surprise was the cable TV with a local music channel.
The terrace is one of the biggest advantages of this apartment. It's not large but it's spacious enough even for 4 people (by the way, there are 4 seats there, and a small table.) You can eat your meals there or have a drink enjoying the panorama of Madrid. The terrace is on a sunny side of the building, so you can sunbathe on it as well.
The apartment is located on the top of the building, so the views from the terrace are amazing. But it must be pointed out that there's a lift in the building so you don't have to bring your luggage up the stairs....
The bathroom is really large and clean, with a huge mirror, spacious shower, toilet, bidet, and a washing machine.
There's a small kitchen in the apartment, with an electric stove having 2 burners, and a spacious fridge with a freezer. The kitchen is well-equipped so you can prepare your meals there. But note that it's really tiny and only one person can fit there at one time :-)
The biggest advantage of this place is its location - right in the center of Madrid, near the Plaza Puerta del Sol which is one of the main city's squares. Before our arrival, I was planning to buy 7-day tourist tickets for us. But when we got there, it turned out that majority of historical sites were located nearby and, in fact, we could explore the city on foot.
There are 3 metro lines and an urban/suburban railway station at Plaza Puerta del Sol. So if you want to see other parts of the city, it's not a problem. You can get anywhere from here, even to suburban sites such as El Escorial.
In conclusion, I definitely recommend this apartment. It is worth the money.