I’ve gone to the party several times but I skipped it this past trip. There’s a special parade they only show at the party (until right before Xmas), characters you don’t normally see, dance parties, snow on main street, free cookies and cocoa, and access to select rides. The party seems to get more crowded every year, so there will still be some waits for the rides though maybe not as long as during the day. So if it’s absolutely important to you to see or do any of those things, that’s up to you. For me, I’ve done it before and it’s just not worth the money anymore.