The apartment's location is very good, not more than 10 minutes by foot into the city and maybe fifteen minutes to the train station (if you arrive by train from the airport or want to rent a car). Everything was clean, modern and exactly as advertised!
Santiago was a very good host, he always answered very quickly and offered that we could deposit our luggage in the apartment even though we arrived before the official check-in time and had provided something to eat and drink for when we got there. Furthermore, he had a lot of good recommendations for sightseeing and restaurants/bars.
I can only recommend this apartment and would definitely book it again!