I take a lot of Disney cruises, and I also happen to be a travel agent with a focus on...you guessed it...Disney Cruise Line. Many people book their own cruises because they like to be in control of the reservation, but using a travel agent has some advantages, too, as long as the agent is very familiar with the cruise line and shps. Here are three:
1) A good travel agent saves you money. The agent may have to sell the cruise at the list price, but that doesn't mean he can't offer you a stateroom credit or other amenity based on the cruise price. For example, I rebate $25 per commissionable $1000 to my clients. Check the prices on the Disney Cruise Line website, then shop around for the best travel agent deal.
2) A good travel agent helps you choose the best stateroom. A stateroom might look good on the ship map, but what if it's right next door to a high-traffic spot like a laundry room or right above or below a night club? Find an agent with plenty of first-hand knowledge and they'll steer you away from noisy spots and tell you the best locations to avoid motion sickness. For example, I've taken almost 90 Disney cruises, so I know the ships almost as well as my own home.
3) A good travel agent offers little extra services. For example, I make Palo, spa, and shore excursion reservations for my clients. Booking with a travel agent should give you value-added services.
Reputable travel agents don't charge you for their services because they get a commission from the cruise line. You get all the advantages for free and should save some money in the bargain. If you'd like to check out my travel agent site, you'll find it here.