This was our first Oceania cruise after many on Celebrity and Holland America. Our French Polynesia cruise was a charter so some of our experiences likely are different from a "regular" cruise so I'll try to stick to the parts I think you would find on both.
First of all, we loved the size of the ship compared to the larger ocean liners. At 1,200 guests this made the ship much more manageable and easier to explore. We also loved that it seemed much less commercial than other ships -- no art sales, few shops, a tiny casino. This ship was built for relaxing.
We had a penthouse suite which in a word was awesome. Tons of space, tons of storage (so much so that we probably didn't use half of the drawers) and a huge walk in closet. It was a perfect place to relax and unwind. Being in a penthouse suite gets you a butler -- he was very efficient and useful. We had him book our spots in the specialty restaurants but he was on hand for almost anything we needed.
Spacious room, tons of storage space and a comfortable bed. Couldn't ask for anything more!