We will be in Costa Rica with a 5 year old and 1 year old from July 13-26. I haven't been to CR in 20 years, but went to Montezuma and loved it.
We want a beautiful house on the beach and easy restaurants/coffee/etc.. The water should be calm and clean and pretty. Originally, I assumed we would go to Montezuma, but I don't know how overrun it is and whether it is so hippified it is obnoxious (i.e. will there be people sleeping on the beach in front of our house?).
Then, I looked into Nosara, which also seems awesome, but looks like it might not have the walking to get coffee in the morning thing. We mostly just want to chill out, eat good food and see the beach and lots of jungle wildlife (monkeys, sloths etc).