Alejandro is a really good host and super communicative. The property is in a fantastic location — a useful metro station and a 24-hour supermarket is across the street. Chamberi is a lovely place to stay. The flat itself is well kept, clean, comfortable, and a good size for a couple, with a really nice bathroom.
The only downside — to no fault of Alejandro’s — is it is a basement flat that doesn’t get too much natural light. Just be aware of this in case this is crucial for you.
Really good stay for a week and good value for money.