We stayed here for a month in November and enjoyed our stay very much. The apartment is really well furnished with extra bedsheets and towels so it was very comfortable for a long-term stay (also helped by the washing machine and being able to dry clothes upstairs on the roof terrace). It's modern and has all the amenities you need.
The apartment was a great size for 2 people and is located in a good neighbourhood - away from the main tourist drag but close enough to the central area of the city and the port. There are also some excellent bars and restaurants around which offer more alternative cuisine than the average Spanish fare.
We didn't have any problems at all during the stay. Something broke in the shower but Belen fixed it immediately so it really wasn't a problem for us at all. She was very quick to respond to us whenever we messaged her.
Would definitely recommend this spacious, bright, cheerful apartment - it ticked all the boxes for us!