Has anyone ever used these while on a cruise? BF and I just booked a spring break cruise and I'm really nervous about becoming ill due to motion sickness. I've never been on a cruise before; however, I always do perfectly fine in planes, trains, and automobiles! If you have used some sort of sea sickness bracelet, did you find it effective? Or, can you provide any other tips/advice? We will be staying in a mid-ship stateroom, which will be playing it safe. Thanks, friends!