I'll first start by saying that I'm writing this review to honor and thank all those who have written about the Oasis over the last year. I think I've probably read every single one of your reviews, enjoyed most and found plenty of helpful hints that made our trip even easier and more memorable. In no particular order:

We sailed the Western Carribean but because of Hurricane Tomas we ended up skipping Labadee and adding Nassau on the end. Without a doubt I would tell you that my only major regret is that I didn't do the Eastern Carribean. Cozumel is okay (more later) but all in all everyone I spoke with agreed that the Eastern itinerary is much more enjoyable especially for first timers.

Pre cruise advice and info: Go ahead and book all the dinner reservations and show reservations that are available prior to the cruise using the pre cruise planner. Many, many of the times are not available by the time you cruise and you'll be disappointed. I would advise signing up for each show so that even if you decide to change the time once you're underway you at least have options. Remember, RCCL let's you standy by for each show and releases seats 10 minutes prior to show time. They do swipe your seapass electronically to ensure you have a reservation. For me it worked every time. Read more