We spent 7 days on the Oasis and could have spent another 7 without seeing everything. Thankfully we had a balcony cabin or I wouldn't have necessarily known we were on a ship.
The main dining room was beautiful, the food good and the service spectacular!
The Aqua Theatre show (Aqua 80) was so amazing...it was like cirque du soleil meets an 80's dance party! we saw it 3 times.
We did the segway tour...I just wish it would have been a longer excursion
I am always surprised that cruise ships don't indicate that the ferry to the main land for most tours is VERY ROUGH. While we don't get seasick, there were a lot of folks who did (at least 1/2 on the ride over and about 1/3 on the ride back).
there is a lot to do on this island but ALL shore excursions are $$$$$$$
We did the chocolate experience...it was fantastic and a lot of fun!