We have just stayed at Casa Calena and as a large family of 11 adults and 3 small children we were extremely happy with the amount of space this villa provides. They is plenty of room and different seating areas so you don't feel on top of each other. Pool area is lovely.
Would recommend you check the map location before booking as Marbella can be slightly misleading but for us this wasn't a problem.
All in all this is a lovely homely villa ideal for families.