That is a decision only you can make. I, personally, prefer to deal with the same person all the time and to know that that same person will be on the other end of the phone when I call. With some of the online agencies, you are luckly if you can even talk to someone on the phone. I would definitely get recommendations from others before using any agency (local or online).
Mary Lou Scanlon
NCL Pride of America April 24, 2010
NCL Epic February 12, 2011
RCCL Allure of the Seas - September 18, 2011
Celebrity Eclipse - February 11, 2012:
RCCL Navigator OTS - February 9, 2013