I'm just going to post this because there seems to be a lot of confusion (in general) about WTR and its benefits.
For starters, there are 2 actual sole norms in the ski boot industry: ISO 5355 (alpine norm) and ISO 9523 (the touring norm).
The alpine norm has very strict dimensions, geometries, hardnesses, radii, etc. for the toe & heel in order to work with alpine bindings.  The upside is a very consistent release from the binding but the downside is that the soles have very little traction and they don't walk very easily.
The touring norm has specific dimensions, but less strict than the alpine norm.  These dimensions dictate the geometry of the toe & heel (height, width, rocker) but allow for a rubber to be integrated into the design with very few restrictions.  The upside is a boot that offers great traction and walkability, but they lack the consistent release offered by the alpine norm.
WTR is a combination of the two, and is labeled ISO 9523 (touring norm).  It has the geometry of the touring norm so it offers great traction & walkability but with plastic AFDs in the toe & heel to offer the safe release found in the alpine norm (it is approved by the safety testing organization TÜV).  The plastic AFDs engage the binding the same way that an alpine binding would, so the power transfer is the same.