We are currently at WDW and have utilized DAS. So far no huge complaints. We have figured out how to use the system with the fp+. I do have one huge complaint and that is all the backtracking and running ahead to get return times. Since they have fp+ kiosks all over the park why can't they extend that service to the DAS cards. You go to there and they can look up wait times and assign your return time from the kiosk. Then by the time you get there you have already cut down on your wait time in some cases. It would just be nice to have that as an option.