My husband and I stayed 5 nights in January and loved every minute of it. Tres Sirenas has an amazing location right on the beach and a quiet, low-key atmosphere that's exactly what we wanted. The owners and staff were friendly and helpful but never intrusive, and prepared a delicious home-cooked breakfast every morning. Rooms are comfy and well-kept. There are a few restaurants within walking distance but you'll need a car to explore most of Rincon. The beach here is not crowded and good for swimming (the big surfing waves seem to be a mile or two up the coast) which suited us perfectly. We'd go back in a heartbeat!