The pool at the JW Marriott was fantastic -- it is stainless steel! The health club was immaculate, and the staff was above and beyond! It was the best service of any hotel we have been to ever! The location was not the best -- it was in the business district of Miami, so we couldn't see the beach. You also can't really walk anywhere. The rooms were nice. The conference rooms were great, however, the food at the conference was mediocre.