Stayed at the Marlin Hotel for 5 days at the end of August 2013.
My friends and I were surprised by the quality of the room. It was well designed and modern. The ro room was huge, with a big comfortable double bed and a nice sofa (used as a bed) next to a big screen. We also liked the clean bathroom with an enjoyable rain shower and the fact everything is remotely managed with an iPad (lights, tv, curtains, ...).
Since it wasn't the high season in Miami, the restaurant/bar of the hotel wasn't open, though, it takes less than 5 minutes to walk to the center of Ocean Drive and all its bars.
We appreciated the good advices of Jeff and the fact we could communicate in french with him.
If I come back to Miami, I will most certainly book this hotel.