I am a starwood and hyatt FF addict but since my partner is a marriott fan we stayed there for the last night. It is a lovely hotel and the location is great on Brickell Avenue for walking and some restaurants. The club room was very nice the evening food was good. Looking forward to breakfast there in the morning. Bed was very comfortable and the hotel very quiet.
We stayed at the Hyatt Regency down the street and it is a bit of a dump compared to this JW Marriott. The Hyatt has constant noise from the bridge next to it as well as traffic. I won't stay there again as a result. This is a much better selection.