I certainly agree with Ngaire's method of sending out "hard information" along with "image advertising." I actually think that "hard information" is more needed by first time cruisers (at least as to the line involved) than it is by "veterans." For example, the other day I received an ad via mail for a steamboat cruise of the inside passage in Alaska. Kind of caught my attention, but I had a few questions that weren't answered in the ad. After my second phone call -- getting put on hold and all -- I just threw the ad away and lost interest.
Thanks,
Richard