We went to see the fireworks the other evening. Unfortunately we decided to go the one evening it actually rained so the fireworks were cancelled. Usually when I was younger this meant there was nothing else left to watch but now they do the projection onto the castle you can stay at watch all of that. In my opinion it's still magical, obviously the fireworks make it something incredible but if they do get cancelled at least you don't feel like you wasted an hour or two waiting around. My favourite part is the Star Wars bit.
Having the infinity passes also comes with the added bonus of getting the VIP area for the fireworks. There isn't any seating which is a bit of a bummer but it's definitely one of the best views in the house. I'm pretty happy sat on the pavement anyway.