I've gotten lots of complaints about them. Be careful to read the fine print! They charge $100 cancellation fee even when the cruise line does not charge one.
Like other online sites whose advertisements are misleading, they advertise "every cruise on sale every day" when they sell the same cruises at the same price as everyone else.
Nothing special - just dealing in quantity.
Best to look for a reputable agent you feel comfortable with and have trust in.
Travel Agent/Cruise Specialist w/13 yrs exp and 48 Cruises on 11 cruise lines! Favorites: Paul Gauguin - Tahiti: Uniworld River Cruises - Europe; Celebrity Solstice-class ships; Holland America - 12-nights Baltics & Russia; RCCL - 14-nights Greek Isles, Turkey, & Croatia; Holland America - 14-day Alaskan cruisetour; 10-night Canada/New England cruise; 21 days Hawaii w/7-night NCL cruise; Oceania - 25 days in Asia; more than 3 months touring Europe by train. And many all-inclusive resorts!