Pros: the education
Cons: the pay and work life balance
Being a travel agent is an amazing experience. You develop relationships with your clients and co-workers and you learn a lot. The travel industry is forever changing. If you're looking to start a career with Flight Centre get ready to give them your blood, all your time because there will be NO work-life balance and you will be greatly underpaid.
Yes they train you really well. They want to cut costs by any means so you will be responsible for your booking (obviously), ledgers, banking, statements (some take about 2 hours to complete). They teach you how to run your own business which is Amazing knowledge to have. Then take 90% of everything you earn. I would consider investing a year with them to gain all the knowledge you can and then open your own business and make more money.
You will find that people are placed in positions by default and not by merit. If you do decide to start with Flight Centre please realize that location is key. Demand a position in the financial district or anywhere where you know the clientele will be high. Avoid working in malls like the plague.