We bought an AP one year back when they used to give out AP discounts for room only reservations. For all I know they still do this but I don't pay attention anymore because I know I can't go more than once a year
However, it was great. We bought the DDE card and went four times in our year. Three times were for short 3-4 day trips over a long weekend and we had one HUGE trip that was 10 days. I remember that we stayed at POP for ten days and it cost about $500 for the room. It think it was about $50 a night.