Centrally located, easy to walk to Royal Palace, El Retiro and every place between. The flat was perfect for us as a couple. Bed comfortable, all necessary facilities. The lock needs a fairly new smartphone to gain access - mine is 3 years old and wouldn't open it but our other phone did it ok. Equally, we found the lock tricky to exit.
There was an issue with some of the cleaning when we arrived but no big deal - Francisco was keen to sort it immediately and send someone round, but we decided to sort it ourselves, which only took 15 mins and meant we could then relax after travelling. Francisco checked in with us before and during the stay and was friendly and helpful.
We had a great stay, the flat was ideally placed and we would recommend to other guests.