let me answer your question first with a question: how did you like Golden Princess? Your answer to that should pretty much determine how you will feel about Emerald Princess because they are basically the same ship. The Emerald is brand new--it started sailing in April; the Golden is about seven years old. And the Emerald has an additional deck of cabins. But other than a few other minor differences, they are the same--look at the deck plans for both. And from the photos I have seen, the cabins look identical.
So if you liked Golden Princess, you are gonna' love Emerald Princess.