Seabands are a godsend! I don't usually have problems with motion sickness but boats make me pretty queasy. Anyway, I went on a cruise about 7 years ago and bought them. The cruise was horrible. Staff members, passengers, etc were ALL sick. I started feeling absolutely terrible as waves were really really bad. We had to sail through really rough waters. I put the bands on and was one of the only passengers to feel fine the rest of the journey. Seriously, they are a harmless way to make you feel better. I highly recommend them