We did this shore excursion through Shoreexcursions.com and it was wonderful, albeit a bit pricey. About $300 for the both of us, with towel service, sumptuous lunch with fancy drinks, loungers with umbrellas and very nice bath/changing rooms. Oh, and transportation was included, but we needed to walk over to the Renaissance Hotel lobby for pick-up. I think they have changed this part, and now have a pier pick-up. All around a great day.
I will agree that the water/ocean is the very calm type, and I myself prefer some wave action. The pool usage was not included in our package.