If you want to see a truly beautiful and breathtaking sunset, take a ride up (about 2km) to the Whales and Dolphin Ecolodge just up the road. It's also a nice hike if you don't mind the workout. The food is not that great at the hotel, so maybe just have a good drink.
I first came to Costa Rica in 1998. I fell in love with the country right away for so many reasons. I have been coming, living and unfortunately never staying off and on since.