The apartment is right next to the Gran Via and you can walk everywhere. We didn't even need to use the metro
The apartment is on a busy street but you cannot hear any noise from the inside.
We felt comfortable and safe in the apartment. We would highly recommend for a future visit. The host was contactable throughout the whole of our stay. He even text me a number of good restaurants to try and we were not disappointed at all with his recommendations.
Thanks again to Ricardo for his kind hospitality