For what it's worth, i think she's incredible on the Into the Woods Original London Cast album as the Baker's Wife.
And the clips I've seen of her in Sweeney Todd seemed good.
But for me her Sally is unforgivable, especially because I love Follies *so* much and it's so important to me to share it with others when possible, and I'm so annoyed the only film of a full production is the one with her Sally at the center.