Using the PS is time saving especially if you are interested in any of the character meals, but those little nicities. If you want any chance of eating at the Cinderella Royal Table make a reservation because the wait can be long. Some of them you can walk right in but for the very popular ones you really do need them. In 2004 we ate at Le Cellier (Canada) that I had made reservations; however the wait was so long that we still had to wait about 30 or 40 minutes before we were seated. Those without reservations were waiting much longer. Of course, if you are interested in the Spirit of Aloha, Hoop-Dee-Doo Revue you really should reserve early. We have never used the EMH but when we've gone to opposing parks rather than the ones staying open late, but they seem to not be as crowded.
Disney Crazy Debbie