Luis is a great host and helped out while I was there for a month, the apartment is pretty big and having two bathrooms is great when you have guests.
The metro is 10 minutes walk away and there’s plenty of cafes and bars near by. As with most buildings in Spain you do get some daily life noise occasionally through the walls but you get used to it and the neighbours are nice.
The third bedroom is bigger than it looks I think you’d be able to room a guest in there no problems.