We came back Sat from a whole week at Disney and yes, the magic your way ticket scan did slow things up, but not too much. perhaps an extra 3 seconds per person. The first time is a bit tricky but once you get the hang of it, its easy as pie. Never had it fail once for me or DH. The kids didnt have to do it. Anyone under 10 does not have to do it. The signs outside the turnstiles explain that they don't need to. So don't worry about the kids having to do it. As long as you put your fingers in tight to the nubs and curl your tips a little around the edge there are no problems at all. And the scan is just for APs and Magic your way tickets. If you bought tickets prior to Jan 2 (old park hoppers) then you do not need to do this.