I saw here in SF a while back, and LOVED her...I thought she had a fantastic take on the Roxie character (dipsy, a bit of a floozy, etc), and her singing was pretty good, as well.
She was at her best during her Roxie speech during the Roxie song. I think Brenda Braxton was Velma in the tour in SF, and she was very enjoyable as well.
"My dreams, watching me said, one to the other...this life has let us down."