Perfect flat to explore Madrid. The place is 1 min walk to Atocha Station and 20 min walking to plaza major, we never used any transportation, such a great location.
The apartment is also very quiet, there are no noises at all, especially at night, even though is basically in the centre of Madrid. Communication with Joseph was very fast, we had an issue for the check in and he immediately replied. Only downside its a very dark flat because its facing an internal yard, but as we were on holiday and always out was not an issue at all. I recommend this and I will def return.