Can’t say that I know anything about these folks, but they have some nice looking classic craft plans available. One difference is their having some plans for "real" craft, and other plans for models.
The other "difference" is a good writeup detailing their plans describing their detail and in what formats they are supplied… CAD files, PDF, DXF, Solidworks… quite a collection of electronic formats… some available for download for that "instant fix". An example of some options of how electronic plans could (and maybe should) be provided.
Obviously plans come in all manners, styles, degrees of detail and quality… its nice to see somebody showing some of these newer options.
I’ve seen cutting files available, but often that’s about it for electronic versions.