I've just installed the trial edition of the plugin to see if it suits our needs. It's looking good, but there are a couple of points about the product filtering that appear to be problems (or maybe just not supported).
I've setup a "myshopping.com.au" feed, but changed Category map in the feed settings to use the "Taxonomy category Map".
1. I have three top level categories (shoes, bags, accessories) and I have specified a category map for each of these in the product filter. Each of these top level categories has many sub-categories that are often changing and new ones added, and I expected that unless I had explicitly specified a category map on one of these lower level categories that the feed would instead use the next closest category map up the hierarchy. However for products in these sub-categories, it outputs the overall default category specified on the feed general info tab. This means that I have to explicitly specify a category map on each individual sub category.
2. It also appears (maybe this only effects the trial?) that if I specify "No" for the export option on a top level category, products in sub-categories beneath this category are still being exported (even the sub-category export setting is "inherit"). I have to specify "No" on each individual sub-category to stop those products being exported.