Not only are the stencils amazing, the use of Isomentric fonts makes the ISO drawing look and feel more complete, that Yoda is one smart guy.
I have made some additions to the original stencils, to add pieces of kit which were not in the package as I am using for a specific purpose and once you start to draw in ISO, you find out what the limitations are for Visio, some shapes it will accept and enlarge, rotate etc some it will not, but it can be fun to try.
Some years ago I did try a similar drawing package 'Conceptdraw', but this had similar limitations. Perhaps it is something for the future to expand and develop this feature.
Stefan