Appartment is in a great location, not in a crowded area as central Madrid, and in walking distance to it.
We were travelling with our 10 months old baby so the toys were really great! Also the baby cot was wonderful, however unfortunately the stroller did not fit into the elevator and we had to take it up and down for 3 floors every time.
The apartment is stylish but some of the things were uncomfortable for us such as the bathroom that was uncomfortable with the baby and the kitchen that it's not very well planned, but perhaps its because of the narrow shape of the whole apoartment.
The host were very responsive, in the check in process (via phone, cause another person meet us for the keys) and also when wi.fi didn't work (we were not mannaged to correct it)