I had a really nice stay. It's a really cosy little studio that couldn't be better located. Generally very quiet (there were parties in neighbouring apartments on the Friday and Saturday nights but to be expected) the complex has a rooftop pool and the studio has a kitchenette complete with microwave and washing machine.
For improvement: it would be very helpful to provide a checklist in English for guests detailing some of the essential things such as checking out, how to use the shower, where the button is for the bathroom light etc. just to make the stay that little bit easier.
For the shower, pull up the main knob before turning.
The light for the bathroom is next to the mirror, not on the inside in the left.
To check out, the main door to the apartment requires a key. I got around this by opening the door so the latch was out and the door couldn't lock and leaving the key in the letterbox (further along the hall on the left - but I only found it last minute). Then exiting. After I had left I received a message from Rodolfo in Spanish (I had to use Google translate) about an exit button but I am unsure where that is.
The curtains are very thin which is great in the day when the sun comes in but it's very light at night if you are a rough sleeper.
Otherwise I really loved the apartment.
Also a word of warning to any Brits who are used to switching plugs off at the switch - if you do this to the wifi router you'll lose the edited name and have to re-connect using the password on the box.