I don’t know must about using DAS but I do know that people are raving about MaxPass. I feel it’s expensive to add for my family, but the one day we tried, it was SO convenient. We were able to relax and enjoy our morning rather than my husband & I taking turns chasing down FPs for Guardians of the Galaxy & Radiator Springs Racers. I felt like we were able to make much better use of FastPass in general without as much work. However, since we have APs and are a family, I can’t quite come to terms with how much extra adding MaxPass permanently would be for us, so we do without. But it was a great luxury not to have to criss-cross, hop & go over the river & through the woods for all the FastPasses
If you’re party is small though, then I don’t see a reason why not to get MaxPass as well!