The apartment is great, modern and spacious. Both bedrooms are large and spacious. Both bathrooms are quite nice as well.
The location is perfect, right in city centre and full of life, with lots of restaurants, shops and bars nearby (can be a bit noisy sometimes though) and at a walkable distance from subway stations that can take us anywhere.
It was too hot in Madrid during our stay but the A/C worked perfectly throughout the whole apartment. The wifi was good too. The communication with the host was very friendly and effective (through WhatsApp).
Overall, it was a very pleasant stay, we will definitely try and come back.