We haven't gotten this letter yet. DH and I have been to Atlantis, and it was awesome! We got a fantastic deal, since we got bumped up to the Royal Tower somehow, and then they gave us a Jr. Suite. We had booked through travelocity I think, and we were supposed to be in the lower-grade "Coral Tower". Anyways, I would ONLY stay in the Royal Tower at Atlantis. The Coral Tower and the Beach Tower just wouldn't be worth the points IMHO. Does anyone know the specifics of the Atlantis trades?
Also, food at Atlantis is crazy-expensive. That's worth considering if you might want to trade for this resort.