Rotor Cranks

Anyone use these to road race? What are your views and opinions?

They are even used in Grand Tour races, on the road. Here are some photos of David Plaza (Tour of Germany winner) and Curro Garcia on Rotor Cranks at the Vuelta de Espana last year:

http://www.rotorcranksusa.com/images/vuelta1.jpg

http://www.rotorcranksusa.com/images/vuelta2plaza.jpg

http://www.rotorcranksusa.com/images/vuelta3plaza.jpg