From the installer point of view, it is a very good product. It is easier to separate the wire from the mesh and not having to run the second cold lead back around to the thermostat is awesome. However, this gripe applies to new and old style. When the wire is on top of the mesh, the loops tend to float up when applying thinset. They need to be fixed to the mesh at the loop in a way that is still easy to undo.
Thank you for your review! We'll take your suggestion to our product team!