I am so glad I did. I wore them from the time I got on the ship until I got off. I even wore them on a small boat excursion. Never once did I feel the slightest bit queasy. On top of that, they look great. They just look like fashionable wooden bead bracelets. I even got a couple of compliments on them.
If you are worried about getting seasick, I can tell you that I highly recommend these. It may just have been totally psychological, but I believe they worked. They were very affordable and the company was a pleasure to deal with.
Have fun cruising!