My wife and I were the lucky enough to get an upgrade to the Royal Suite Room 6138 on the Infinity to Alaska. The suite was beautiful and the service was impeccable. Very spacious. Since the Millenium is the exact same configuration all the suite setups are the same.
This suite did have one disadvantage being in the aft section of the ship and that was the rolling motion in some rough seas on the second night of the cruise. It was quite a ride. Luckily it was just the one night and other than that it was extremely quiet and smoothe the whole trip. You will love it.
We will be in Suite 6124 on the Alaskan cruise on the Infinity next month and can't wait. Looking forward to all the amenities and especially since we also got a great deal ( less than 1/2 price) through cruisequick.com. Meals served in the room will be great after all the fishing ( halibut and salmon) we'll be doing.