Germán's apartment is nice and as advertised, if a little basic. He went above and beyond to help us at check-in, staying up til 2AM messaging to help us get into the apartment after our flight was delayed.
It's a little out of the way - a 10-15 minute Uber (€7-10) gets you to Mar De Cristal, a mini shopping mall with a Carrefour and some clothes shops, and also has a metro stop which takes about 25 mins to get into the centre - and would be easier to visit with a car.
The apartment is missing a few basic things - a kettle (but as a Brit i don't know how important a morning brew is to the Spanish!), an oven (although it has a microwave and hob) - but served its purpose well enough.
The apartment block is very new and exceedingly quiet both at night and during the day, except for a few hours of building work.
Overall it's a nice place for a short stay, but if you like the nightlife prepare for a fair bit of travel.