I'd seen it twice in New York (once with the great Idina Menzel) and was worried that it might not seem as special in SF. When we got there we learned that the two main roles (Elphaba and Glinda) were to be played by understudies.
Vicki Noon played Elphaba and did a very fine job. Natalie Daradich was pretty good as Glinda. Nicolas Dromard was only OK as Fiyero. The play still rocked! "Defying Gravity" gets me everytime!