Usable but Limited
I tried a few utilities for simple bluring of faces and this one works ok. The blur quality is good but you are forced to use a circular tool. With some photos this looked very good but with others it looked like a blurry circle was dropped on top of the face. Undo is simple and overall this is a somewhat useful tool for $2. If you need any control over the image you are better off with the Retouch tool in iPhoto; I’ll be using both Retouch and this App when I need to hide some faces in a group portrait or post something to Craigslist.
Critical user about Touch Blur