We've been twice. Once we made "reservations" from US in the morning and in January I called a few weeks ahead. This past January over MLK weekend we still waited about 20-30 minutes with PS. I'd make the call if you can.
Bob
Definitely make reservations. My DF and I went in July, had reservations, and was seated within 5 minutes. The man in front of us, with "priority seating" with his room key, was told it was an hour to hour 1/2 wait!
No...but depending upon when you're going, it's not a bad idea. You can make reservations that morning at CityWalk if you so desire.There is a kiosk across from the theater that can make the reservations for you.
I'd go ahead and call just in case the restaurant has been rented out for the night. We were there last January and couldn't eat the night we did Universal due to a private party.