Here is a very good article about the new Koren Siddur, which I now have in hand. It is a beautiful book, and will surely take it's place alongside my treasured Jerusalem TaNaKh.
Prayer Type
How Eliyahu Koren used typography to encourage a new way to pray
BY JOSHUA J. FRIEDMAN
It will come as no surprise that the new siddur was set by Jerusalem typographer Raphael Freeman. It is also one of the rare siddurim not to put English and Hebrew in "dueling" position—instead, the two languages work together, reading out from a common spine.
Many thanks to Josh Friedman for noticing the book and writing about it with some knowledge and depth.