I used one at the NXTi training a couple weeks ago and I'm on the list for one from Kevin Brown. $394 + $5 shipping. Bad a$$ machine!!!
It blows the Flex away! With the 21mm offset you would not want a smaller backing plate on it either. It's not the end all be all of tools that's great for everything everything, tight areas being on of them, but it IS one heck of a tool! Hop on Kevin's Facebook page for more info.
Here are a few pics of it in action at the NXTi training.
From L to R:
Addison Good, Kevin Brown, Greg Nichols, me, Jason Rose.