I've stayed at 5 Hyatt Miami properties (the Blue, HP near the airport, Coral Gables, Downtown and Victor) and my "go to" property is HR Coral Gables. It is in a very nice upscale area - w/lots of shopping/dining options w/in walking distance. It isn't esp. close to the beach though. The HR Miami is a bit closer to the action, but I prefer the restaurants/shopping options in Coral Gables. T
The "Hyatt at the Blue" is a time share. The rooms are quite large w/kitchens, etc.. but it is ultimately still a time share property and not conveniently located.
As for the Victor: the only thing "good" about that property was the location - and even that had problems.