Such a memorable stay. I agree this is the best location in Montezuma. We stayed in the larger 3 bedroom villa. AC and fans made for wonderful sleep. There were mosquito nets on the beds, but totally unnecessary (at least when we went in August). Hot water showers, beautiful black bottom pool, and gardens that the monkeys visited and the tap water was safe for drinking (at least none in our group of 4 ever had stomach problems at any time in Costa Rica).
We took the Cocozuma water taxi from Herradura beach (1 hour) and it dropped us off right at Montezuma Beach. Oldemar (the house caretaker) was waiting for us to take our luggage to the house. As noted, the caretakers speak very little English, but they were wonderful in making sure our stay was comfortable and even chopped coconuts off the palm trees for us to have fresh cocoloco drinks (rum and coconut water).
The fireflies gave us quite a show one night and the turtle hatchery in front of the property was a highlight. August is baby turtle season and we got to see a batch of 69 babies make their way to the sea with the help of amazing volunteers.
The beach in front of the house is sandy (not rocky like some areas) with good waves for playing. I hope to convince the whole family to come here for a reunion!