My two daughters (5 and 8), husband and I stayed at Casa Del Toro for a week and loved every minute of it. It is beautiful, open, and relaxing. The outdoor patio is huge and so comfortable for any activity - dining, rocking, lounging, swimming, etc. The view is pretty by day and night. It's nice to be "up above it all." Another big plus for us was that the house, while offering AC in each room, lends itself to being opened up to the outdoor breezes. That was a major selling point for us. Even when you're inside, you feel like you're out. One other thing you may want to know about the house is that, while close to Quepos and having neighbors, it is quiet and feels extremely private. Nobody can see into the house or even the outdoor area. Very peaceful.
The house is GREAT for kids my girls' age or older. For toddlers, it could also work as long as you were diligent with the pool and the railings off the patio.
The service was also spectacular! Tom was extraordinarily welcoming as well as helpful. He showed us around twice, helped to take us different places throughout the trip, had a great IT contact when my computer failed, and even managed to send me the phone I left behind overnight to another location in CR! He went way above and beyond.
We would very highly recommend this place!