Thanks Miquel! The property is as described, and actually much bigger than it looks in the photos. Unbelievable views of the mountains from the balcony, close to the beach and the centre of the resort (which is in a stunning setting). Miquel's communication was great, and he helpfully arranged for a cot and left a bucket and spade for the beach, which our 3 year old loved. The owner of the property lives below and was very friendly.
We stayed with our 2 1/2 year old and 5 month old children. On entering, there is a staircase going down immediately next to the door, and unfortunately no stairgate was available. The balcony railings are about waist- high, fine for adults or perhaps children used to balconies, but we didn't feel that we could relax so ended up keeping the balcony doors shut during the day (easy to do). The decor and furniture would benefit from modernisation but everything you need is there, although the kitchen is quite small.
I think it'd be great for a group of friends (as if you split the cost it's superb value for money given the location), but as a family with young children we would probably choose somewhere else next time.