I sailed on the Splendor and Dream in Oct and Dec. I was on the Riviera deck and Main deck in the port hole rooms which are in the front of the ship.
Even when we hit rough seas, it was not bad at all, but I must admit on others advise I took Ginger pills daily.
Now, what did happened on both ships, daily was there extremely loud banging noise. It sounded like furniture was being thrown against the wall. I was told it was the waves hitting the front of the ship. Even when the anchors were lowered, it was loud but tolerable.
If you can stand these two things, you should be fine.