We stayed at Marenas Resort many times. This is the first time we stayed in a private condo not in the hotel. My disappointment is only related to the specific unit we stayed in and its owner's (or manager's?) attitude to guests, nothing else.
It is poorly maintained. Stains were everywhere - on the carpet, mattress, chair cushions, etc. The bed linen was very old; so old that the sheets had little holes. Some closet drawers and sliding doors were broken, so we even couldn't open them. The shower curtains was old, its hooks were old, dirty, and fully covered with rust. There were two of us, and we only had two bath towels for 4 days. We arrived at 7 am and couldn't even check if the unit was ready or not because we didn't have any contact information. We got access to the unit at 4 pm, and only at 8 pm someone (no introduction, no Hi or Bye) texted us and asked if we were accommodated. We texted back and asked how to get access to WiFi in the unit. Nobody answered! There was no WiFi there, only the common hotel WiFi, not strong enough even to watch a movie. For about $250 per night the unit definitely was not what we expected and what we got used to in Marenas. We felt we were not welcomed at all. The necessary improvements (furniture repair, new bed linen, etc. ) would take a penny not millions. We just clearly understood the owner (or the management company?) doesn't take care. I will keep booking Marenas for my next trips to Sunny Isles but never again the condo.