Stayed here over Christmas holiday (two nights). Wonderful stay from check-in to check-out; staff was exceptional as were the overall facilities and location (JW Marriott and Four Seasons flank the Conrad).
This is mostly a business persons' hotel, but lends itself well for savvy leisure travelers too. Just a short 15 minute ride into South Beach where all of the craziness lives. Love coming back to the Conrad afterward for peace and quiet.
Now for the minuses:
Expensive parking ($38), but look around the immediate neighborhood and you can find affordable ($15) overnight open uncovered/open-lot parking options.
Breakfast items are unremarkable; but I don't select a hotel based on breakfast offerings and neither should you...this is Miami baby, plenty of great places to eat!
When I'm back in Miami next, I will stay at Conrad again.