I would like to read about someone's Pinel experience, too. (Want to mention I have heard this is a clothing optional place, if this would bother you.) We went to Dawn Beach last year. There is a reef very, very close to shore that offers decent snorkeling. You can get a cab there from the port and there is a place to eat right on the beach.We once stayed in St. Maartin for a week and were taken to Anguilla (another island) to snorkel. I would not say the areas around St. Maarten offer the best snorkeling, but if you are desperate to snorkel (like we usually are!), there are options.