I stayed at the Z Ocean for 2 nights (16 -17th Aug 2013) and thought the hotel and its location was amazing. All of the staff were helpful and friendly from the man in the car park, the reception desk, concierge, bell hop etc etc. The rooms were spacious, lovely bathrooms and a great shower. I booked the spa suite and it was nice to relax in the hot tub after a hot day seeing the sights.
I would not hesitate to book the Z Ocean again when I return to Miami. If you like a large breakfast, even by American standards, go to the Fornt Porch cafe - it was the best breakfast we ever had and huge !
Another plus point was the bed, it was so comfy.