We found hotel parking v expensive in Miami it's cheaper to park in public parking garages $1 an hour normally although one lot at south beach was $20 for 2 hours but that was just ripping off tourists panicking as driving can be challenging - we valet parked couple days then returned our car to Alamo on Collins at mid beach near the Marriot hotel then got taxi to Alamo sunny isles (north beach) to resume car rental few days later For remainder of trip which was much cheaper than parking & as we'd been relaxing & out on local tour bus trips made sense. Alamo at Collins mid beach are not on US car hire so we had to use Sunny Isles agent near Trump Towers on Collins Ave but found their staff really friendly & got upgrade to car we wanted for long drive back on turnpike. The nearby Aventura mall is as good as if better than Millenia just 5 mins over causeway. Shopping in Miami was not great - Lincoln Rd mall was not worth visit tbh. Esp as outdoors - far too hot!