Before arrival Ignacio sent a lot of helpful information about how to get to the apartment (maps, various transport methods etc.) and was always quick to respond to any messages.
Ignacio was waiting for us in the apartment upon our arrival around 10pm. The place was as pictured/described and totally spotless. It's in a good location close to main sights and metro links. Very good value for money, would definitely recommend to anyone going to Madrid.
*Apartment is on the 4th floor with no lift so you have to be fairly fit, especially if you have heavy things to carry*