A great app that Adobe Illustrator is sorely missing. Works almost exactly like Adobe Streamline (which has yet to be ported into OS X). Very accurate translation of bitmap data into vector curves, color selection prior to conversion, and all done in Illustrator without an outside app!
However, I suspect that like Adobe Dimensions, this Streamline knock-off will be bundled with Illustrator soon. For this reason alone I think the price tag is a bit too high. I also agree with the other review that this is priced too high for a plug-in.