Just got back from Marriott Frenchman's Reef. We had a great time there.
I ordered two C17s for four of us (mom, dad, two teenage boys). It's nice to eat and drink what we want, when we want, and where we want without any concerns for cost
In the end, we ordered almost $3000 worth of food and drinks (plus tips), plus the rental of snorkeling gears and floats. This may not be the best usage of points but it's worth it to me for the fact that I don't even need to think about the cost during the entire stay there...All we did is to write "AI" on all the bills!
Let me know if you guys have any specific questions. I'll try my best to answer.