We booked this year's Transatlantic on the NS while on its crossing last year. We liked the $100 deposit, and most of all the $250 onboard credit given for booking onboard. We requested the guarantee rate which made the deposit non-refundable, but that didn't bother us. They actually had a $1 deposit sale while we were onboard which they would honor onboard, but with the port time and their office hours that day, we didn't catch the $1 deposit sale. We booked the next day.