Just a word of caution, if you are picking up your tickets @ will call, GO EARLY!!! or the day before if possible.
We arrived at the MK at 7 PM (not our fault we had to wait over 1 hr for a bus from BW; we were at the bus stop @ 5:20) and there was a line at Guest Services that went back to the monorails! Actually there were several lines that had to filter into the 1 line for GS, because everyone decided to make their own lines. My BF went to the turnstiles (along with several other people) and complained about the wait, and missing party time, which turned out to be an even bigger disaster. There was no coordination and nobody seemed to know what was going on, even a manager that they brought out. Long story short, they let us in with our confirmation, but we did not even get into the park until 7:45...
Having said all that, I'm not sure if we just hit it at a really bad time, or if this was a consistent problem, or if they have improved the process...