We booked this hotel online as part of the "see more of Miami" deal. We paid for two nights and got our third free. Situated on Brickell key the location is quite exclusive. The hotel itself is beautiful and we lucked out with a suite on the top floor with views of downtown and out over the water. We loved the room and it's facilities, but weren't really there long enough to take advantage of all the hotel had to offer as our aim was to get out and about and experience Miami. We didn't dine at the hotel or use the spa and the weather kept us away for the pool/beach area.
Nevertheless we had a lovely stay at the Mandarin Oriental which is well located for exploring the Mary Brickell Village and bayside marketplace - both if which are an easy walk from the hotel.
My only complaint would be that at a hotel of this standard I wouldn't expect to pay extra for Internet access - but we did! Also, Valet parking was the only option for the car and was expensive at about $36 per day! They should include the internet and valet parking in the room rate!