Millennial travelers may be harder to please than other categories of travelers, but they are just as loyal to hotel brands as other guests, says Rick Garlick, global travel and hospitality practice lead at J.D. Power, which on Wednesday released its 2014 North America hotel guest satisfaction index study. "The moral of the story is millennial travelers, you can get their loyalty. You might have to work harder for it," he says. "You might have a more critical traveler. But if you can make a positive impression on a Gen Y traveler possibly through a positive staff interaction, you can potentially have a loyal traveler for life."