We went Thursday last week - we weren't there exactly when the park opened, but pretty close. Walked fast (didn't run) to get there. Waited about 15-20 minutes. By the time we got out, the line had grown to about a 30-45 min. wait. I would definately recommend going first thing. Last Tuesday, we kept checking it out as we were in the area doing Matterhorn, Space, Buzz, Jedi - but each time, the line was just too crazy long to wait. Good luck!