What is challenging in musical theatre is that you have to maintain your abilities to a high level by constantly warming up vocally and put yourself into the right condition hours before the curtain goes up ; well at least that's how I approach my work, and actually I do that as an actor anyway ; so maybe the biggest challenge is to keep going, fresh and always on top form, when you have to deal with very long contracts, taking care of never getting bored and readjusting things all the time. That is a very tough call. But it's worth it cause it teaches you the craft, its realities and its shortcomings as well as the tremendous joy it gives you. It's a life style in a way, you have to be very dedicated and very humble because nothing is ever set in stone. And that's the beauty of it.