The description sounds very interesting, it seems to be a very powerful tool. However, I have some concerns about the price: is a tool just for sharpening really worth 99 dollars? The normal PhotoKit costs only half that (and includes a whole bunch of useful tools). Sure, the sharpening functions in PhotoKit aren't as sophisticated, but somehow I'm reluctant to spend 100 bucks just for this one aspect.
At PhotographyBLOG you can find the original article.