Had my first cruise in January on the Legend, as mentioned above its a Spirit class so very similar to the Miracle although the colors and decor are a little less 'wild'. Reading the stories behind each of the 'legends' photos in the stair cases was fun.

We got a good price on an extended balcony. Its the regular width but 50% deeper which gives you more room if you plan to spend time outside. A word of caution though is the extended balconies line up with the sections of ships that have lifeboats a few decks below. So although you see the water fine, if you were to look straight down you see the tops of the lifeboats. We only paid about 40$ more for the extended balcony, if it had been more I would have preferred a regular balcony where there are no lifeboats.

You might want to look at cruisedeckplans.com to overlap deck plans and see just what is below and above you. I always try to make sure I have rooms above and below to limit the noise and not take a deck right under the buffet for example.