The apartment is situated in a great location. As close to the sea as you can get, you just cross the street and you are on the beach. Walking distance to the train station (~900 m), zoopark, Sohail castle. Also to post office and the town hall, FWIW. I recommend to visit the zoo (Bioparc), especially if you are coming with kids. In Sohail castle they host a local Oktoberfest beer festival during the last 2 weeks of August. Many good restaurants and bars in the area. The closer to the castle - the cheaper. :) Many bars have TVs and show football matches. There are good supermarkets too. There is a small one on Plaza de Picasso and a large one called Baly several blocks away. And numerous other small ones here and there.
The apartment is clean and well equipped. Beds are good. Bathroom contains bathtub with a sliding "door", so you will not spill water drops all over the bathroom. The shower hook on the wall is in the middle of the bathtub area, not on its edge. A bit odd, but usable. There is a washing machine in the bathroom, with Spanish labels on buttons but the owner cared to glue own "1" and "2" labels for the 2 most important buttons. The sink is large and practical, with big mirror and downlights, very good for shaving. The kitchen contains all the necessary stuff: stove, microwave oven, fridge, coffee machine, boiling/frying pans, plates, glasses, cups, forks, knifes, spoons, wine bottle opener, can opener. No dishwasher machine. The stove can work both on gas and on electricity. The fridge is big, with big freezer.
There is no WiFi in the apartment, that helps you to have rest from all the computer and Internet stuff that chases you the rest of the year. :) And enjoy the sea instead, and other stuff that Fuengirola has to offer. For the Internet-addicted: you can buy a Lebara SIM card (7.5 EUR) in some supermarket or tobacco shop. Or even order a free SIM from Lebara web site. And then buy some 4G Internet package (for example 4 GB for 9 EUR). Or use free EU roaming if your come from EU. Or use WiFi in restaurants when dining.
The sea is warm, the beach is sandy, the sea bottom is also sandy, sometimes with seashell particles, and their amount somewhy depends on the weather (stormy/calm). The sea is usually calm, but during our first 2 days it was quite stormy. Almost no jellyfish, you can rarely meet them and only a bit far from the shore.
Communication with Pierre was good: short, concrete, to the point. We haven't met Pierre personally, but we met his colleague Alexandre who spoke my native language. He was very helpful, showed us around the apartment and walked me a bit around the area, recommended some bars and shops.