Since Philharmagic opened, on MK days, that has been the first thing we've done. When the park opens, we veer left, go over the bridge into Liberty Square, take the first right, which is a little path right along side the castle, and then to Philharmagic. We've always walked right to the lower holding area, and have never waited more than 10 minutes to get in. We've never seen it more than once on the same day, so I don't know about the crowds or fast passes for it.