My brother was supposed to get one with this 120-300mm Canon mount lens but it was delayed last I saw him. It's a very cool idea, but the unfortunate thing he's finding is that the calibration (which is very cool) can only be applied for a single camera, and you can't save individual profiles off on a computer (at least not without hacking a bit) for retrieval later if you want to switch back and forth. He's in a bit of a fix in that the lens works great on two of his bodies as-is, but is problematic with another (I forget which). If he fixes it for the problem body it's now no good for the others. Hopefully that will change. It's a great idea, and should hopefully improve with time, but it's still in its infancy. I'm not even sure how many commercially available lenses it works with.