We stayed at Casa Caracol last year and loved it. Phil and Marie were great hosts and the house was wonderful. It is located on the north side of town, right on the beach. The accomodations are quite comfortable and we loved it. It is also right around the corner from the la popular (i think that was the name...) bakery and Papi's (best food on the island, in my humble opinion...)
The house has a nice front balcony with chairs to sit out and watch the world go by and catch the ocean breeze. You can ask Phil and Marie to stock the fridge with your favorite beverages so they are there upon your arrival. They are also happy to book any day trips, fishing etc. We found the house to fit our group perfectly. We were traveling with two other couples and it was nice having privacy of your own bedroom and having a kitchen to cook a meal or two or have breakfast or lunch was great.
if you have any other questions just ask, or I'm sure Phil or Marie would be happy to help you out. Enjoy!