A friend just got back, and said the DAS card worked wonderfully. Just stopped at the first park and explaned her childs disability and what he would have problems with. The card worked at all parks then also, no need to stop at each guest relations. You can use it in conjunction with the fast passes that are alloted each day for you and your family nembers. You can only have one return time for an attraction. Unlike the fast pass, if you get back after the 1 hr. Window time, they will stii honor it. Return times with the DAS is 10 minutes less the attraction wait time, amd if wait time is less than 10 minutes, you are sent through the fast pass entrance without waiting.
we are actually going again next september. We have always used the guest assistance card, not so much for the cf, but because of his autism. Waiting is not a strong suit for him, so this was a must for us.
have you tried the moms panel on the disney wirld website? You can find answers to most of your questions, and if you dont see it, you can ask a question, and someone will get back to you.
hope this helped a little.