Here's a link to the Talkin' Broadway review of MY ONE AND ONLY.
I've excerpted the best parts, below:

http://www.talkinbroadway.com/regional/la/la225.html

York turns out to be Reprise!'s biggest asset in this production, as
she gives the role of Edythe considerably more than the mere outline
that the script provides. York puts a well-developed character in
there - her Edythe is smart and strong when talking to the press,
less sure of herself when in the presence of the show's villain
(watch how her upper class British accent falters into lower class
when she's thrown off-balance), and simply delightful when she
allows herself to fall in love. But more than that, she's a solid
tapper and a powerful singer. Her "How Long Has This Been Going On?"
is downright incandescent.

Every single review has called that number the show's highlight. I
can't wait to hear her sing it - Sept. 17 is just a few days away!

lc