This would be a nice addition to my photo tools if it worked well. Unfortunately it is very unstable, crashing at least once for each picture you process (often of course before you can save the result). Also, the function set is quite incomplete. While it has a "freehand" tool to set the region not to be blurred, it does not have the opposite - setting a region that _should_ be blurred in a given image. This is true for every other selection tool the program offers. There are huge problems in combining effects, eg freehand and gradient, and the selection tools are painfully slow to work with, almost unusable sometimes.
If this was alpha stage software, I'd say it looks promising. But charging money at this stage of development is not ok.