We have just come back from staying there. We had no problems getting to the parks by using the shortcut. It only took 15-20 minutes to get to MK, and 5-10 minutes to AK. We left an hour before park opening to get to MK to give plenty of time to get the tram from the parking lot to the transportation center and then the monorail and ferry to the entrance and get through the bag checks etc before park opening. For the other parks we only needed to leave half an hour before opening to be there for rope drop.