Driver came on time, drove cautiously and got to airport within time frame outlined by transport provider.

I arrived like 100am at MIA. Once you exit the ground parking, just look for Super Shuttle agents in yellow/blue. I didn't have to wait too long for the vehicle

I checked around to see what available prearranged shuttle available online and decided using viator because of limited options. However, when I arrived, the local transport operator wasn't at the airport to receive us. We decided on taking a taxi.

It's cheaper to using a local taxi as they normally charge around USD30.00 per car. Also, check with the hotel if you are staying at one to see if they can prearrange as their prices were even less than USD30.00 in each direction. As always, do you research and read other reviews for guidance.