I tried a pair a few months ago but quickly returned them. Okay boot I guess but not on the same scale as the Sidi's.
I bought a pair of the Sidi Vortice's for track use and a pair of Vertigo's for street. I've had Joe Rocket's best boots as well as Alpinstar and a couple others and none compare to the Sidi's. Expensive, but last for a very long time and worth every dime in my book!