I've been on the Allure of the Seas 3 times before my first trip on the Oasis of the Seas, so it was nice to see what differences there were on the Oasis. I am writing a pictorial review on http://cruiseforums.cruisecritic.com/showthread.php?p=44201225 which goes into more detail of what I did day to day. My overall experience on the Oasis of the Seas was good. Because of the short trip, I didn't expect an exceptional service, but just the basics. I barely saw my stateroom attendant during the week, but he was helpful when required.
Dinner service was ok, but this is something I have experienced 3 times on the Allure of the Seas, so wasn't expecting a lot. I am starting to take the hint that the "Recommendation of what to eat" was pretty much rehearsed and not something that the table waiters would really recommend. I could be wrong, but it's no big deal.
There were a couple of days of rough seas around Italy, but nothing serious. It took me 3 days after the cruise for me to get used to being on land again.