Saw it in SFO. It's the story of the Wicked Witch from the Wizard of Oz. There are lots of great numbers, including "Defying Gravity", "Popular", "Dancin' Through Life", and "No One Mourns the Wicked". Really, they're all quite good.
I've seen this show twice. Once with my best friend and once with my husband. It's a surprise to see the story of the Wizard of Oz told from the point of view of the Wicked Witch. Everything about it is awesome. I would go to see it again. The special effects are dazzling and the music has been described as 'thematic film' music.