ddicarlo
I took this trip September 2018.  Loved it but I did get seasick when approaching and leaving Mikonos.  I did not come prepared with scopolamine like others did so I would highly suggest that you get a prescription from your doctor.  There were sea sickness pills on the ship that the crew provided but they really need to be taken a few hours before you get sick.  Also make sure you eat, sea sickness is worse when you have an empty stomach ( I know from experience).  Always better to be prepared.