I attended a conference at the Mandarin, Miami in early May. I have to say that this hotel has it's act together. The attention to detail, the high quality serivce, the impeccable grounds, food views and location were exceptional. The staff is trained in the classic Japansese model of service. Even the housekeeping was incredibly friendly and always making sure we had everything we needed. I nornally stay in South Beach when i visit Miami, but I think this hotel is a great alternative. The hotel is on Brickell Key which is an exclusive residential community. The location is convenient to shopping and dining and only about 10 minutes to the beaches.
My only complain is that there is no bar. You can order a drink in the lounge or at the pool but they go "somewhere" to prepare it. Great experience!