We really enjoyed Casa Madeline.
The 4 large bedrooms we so nice and the open common area with a spacious kitchen made hanging out comfortable and fun. The modern appliances were easy to use and up to date. The air conditioning did a great job keeping up with the heat index above 105 fahrenheit. Bathrooms were also spacious.
What you really care about is that the ocean could truly not be closer. Maybe 20 steps down a nice path and the water is right there. This made running back to the house for drinks or snacks super easy. Playa Grande is great with nice water, great waves, and long beachwalks possible.
The pool was a perfect temperature and cleaned daily by the grounds keeper. The ocean could get a bit cool for our kids and they appreciated warming up in the pool after playing in the perfect waves.
The neighborhood around the home is also very nice. There are a few small eating establishments (we didnt try them, but they seemed nice), an ice cream spot, and the small market can take care of the majority of your needs. Surf rentals and live music are also close (walking).
The house felt very secure. Costa Rica in general seems very safe, but locking gates and a security system in the home can make if feel even safer in case you have concerns.
My only suggestions for the owners would be to update the sofas/living room furniture and the outdoor chairs, and to add more dishes to more easily accommodate 8 people. These are MINOR concerns.
Communication was easy too!