We got to see a preview, which amounted to next to nothing because we were to the left of the castle and our view was blocked by trees and umbrellas. All we saw was a snippet of carousel horses on the castle and the bit of fireworks above the castle to the left.
It seems that, like the previous show, this one isn't worth seeing unless you stake out a spot way early to guarantee a clear view of the sky, the castle, and the area to the right of the castle.
Had any CM ever been willing to even hint that, yes, they were having fireworks while we were there, I would have made an effort to do so. As it is, I have found that the CMs seem to be completely uninformed about anything to do with
Disneyland. I even had two tell me I was wrong...that they didn't have them last Wednesday. Funny, we heard them and saw light from our hotel room. UGH. Disney CMS are clueless!