I have used both relief band and EmeTerm on cruises, flights and for work when i need to ride in back of an ambulance, I vastly prefer the Eme Term to the relief band, the battery life is longer, is more comfortable and easier for good contact, although both do work for me for nausea related to motion. On a cruise you have to either have 2 to charge alternately and rotate wearing one during the day the other at night or not wear one at night and take meclazine before bedtime, at least 2 hours before removing the ere term. If you have any further questions about the models and options they offer feel free to ask, I have basically used all of them. I prefer the explore for the EmeTerm models but also have the mini as a back up and to use if go snorkeling since it is water proof. Out of the Relief band models, prefer the sport over premier, the shape of the band on the premiere makes it loose contact all the time.