We were here with family of all ages and had a wonderful time. The location is great for checking out the Atlantic coast and southern Spain - 1 hour to Cadiz, 1 1/2 hours to Gibraltar.
The good: The house is large with great security (you need keys to get in AND out of the complex). Great grounds. Has 4 bedrooms and 2 1/2 bathrooms - you could even sleep 12, if 2 slept on the couches in the living room. The pool is fantastic and you are about 150 meters walk to the edge of the Atlantic Ocean. Mid-June the weather was pleasant - warm and sunny, but not too hot. Some wind most days. The house has a washing machine (no dryer) and a dishwasher and plenty of dishes and silverware. There is secure parking right under the unit. Small Market nearby.
The bad: The rental company is in France, though the owner seems to be Dutch. All of the contracts and materials were sent to us in French, so it was a bit of a challenge to read them. The unit was also quite hard to find - the directions sent to us were poor and we had to call Holland as well as the local agent several times. It's in a complex called Jardines de los Atunes before you get to the Hotel Melia Atlanterra, but things are not well marked, especially if you arrive in the evening/nighttime.
There is also no oven or even a toaster - there is a microwave, stove and a good-sized fridge and freezer. So no pizzas for the kids. The kitchen knives are very dull. The internet is non-existent in the house. In order to get the Hotel Wi-fi from next door, you would need a password, which is not supplied. We ended up going to a bar downtown (4 km away) which is below the public library and using the library internet. That saved us.
The parking is right under the unit, but it's extremely tight, and as this is the first unit near the gate, you have to do some driving gymnastics to fit into the spaces. There are two spaces - get the smallest rental car you can - it makes turning around in the garage much easier. Only one gate key - a problem with 2 cars/drivers.
Lastly - this is the first 'beach house' we have rented that had no beach towels! We had exactly 8 bath towels for 8 people, and there were no beach towels. We washed our towels often and doubling up on our use of them. There were beach toys, though - which was nice.
Overall, the layout of the house and the location of the house are great - 8 of us had plenty of room and plenty of fun. Fixing some of these details would have made the experience 5 star.