Stayed twice with family of 4 while overnighting in Miami between flights to/from Bahamas. Service was very attentive and enthusiastic, but rooms are tired, AC is the type that goes through the outside wall (not central), very loud and cycles frequently, walls are thin (could hear water tap running loudly beside our room through the night), and hard to get a good night sleep. Main beds (2 doubles) are very uncomfortable compared to most standard hotels these days, and the pullout sofa bed was simply awful ... the mattress was about 3" thick with metal springs that could be felt right through the padding.
Pros: Wifi included in room rate (rare for Marriott brands) and premium cable TV, free shuttle service, complimentary breakfast bar w/ hot/cold food
Cons: awful beds, noise level in room, AC cycles loud and frequent
Poor value for money spent ... have been much more comfortable at half the price.