Staying at Alejandra's place was an absolute pleasure. The place is located ca 20-25 minutes away from Atocha train station and it is easily walkable or you can take different buses to come and go.
Alejandra is a very nice host and it was easy to communicate with her (even though my Spanish is not perfect at all).
The room is rather small but you have everything you need and for a few days it is absolutely perfect.