We had ocean view on deck 2 of Explorer of the Seas last year and I loved it. The windows are round but very large. I would say 3 1/2 to 4 feet in diameter basically from the top of the bed to the ceiling.
The one thing is that on decks two and three you can not walk from the front of the ship to the back of the ship. On deck 2 the conference center is in the middle and on deck 3 the ice rink is in the middle. That's no big deal but if you're booking more than one cabin you'll want to make sure that you book them all either in the forward section or the aft section. I prefer forward. Really cool to look out the window and watch the bow wake. You'll love Adventure of the Seas. :thumb
