We went to Play Sol in May.It is a very nice beach but very crowded. Lots of beach chairs all over the beach. We went a few years ago and liked it much more.
If you want a truly relaxing beach, take the tour to Passion Island. It runs about $70 per person but it is well worth it. It includes lunch and free drinks ( soda,water, or booze) , whichever you prefer. There is shade, hammocks and water mats to float on. We spent our day floating on the mats with a marguarita in our hands! The lunch that they privide is Chicken, burgers,fish, tacos, nachos,salad and fruit. It is very good. Also, the tour operators are very good. Before you head back to the ship, they break out the tequila! This tour may seem a little pricey for some but it is well worth it! We will definetly do this again!