I understand your concern with this one. We hear about people being taken by agents who get their money and they get no trip. I have had my trip planned for so long with Aruba4u --i think my papers have cobwebs. Because the company has come so highly recommended the fear you are expressing has never crossed my mind.

When you book you have to pay for your airfare up front.
(thats a given and with almost all travel agencies)

the hotel I dont have to pay for until the end of July-so the money sits in my account til then. So you book with the MCM tours-- get your air and dont finish paying until 45 days ahead of time.

I am with ArubaLisa with this-- I would be more worried about the flights..