We used Magical Express in August. We followed the signs for baggage claim. Magical Express was located down by the rental car stations on the lower level. You will need to check in at the Magical Express Counter and from there you will look for the line for the hotel you are going to. Someone will let you know which bus to get onto.
From the actual time we got off the plane and arrived at check in, the total time was about 1 1/2 hrs.