I'm sorry to only rank 2 stars, but I only have two products out of the 100's of products I sell that I needed to apply a min quantity to. I was hoping your free version would work for just those two products, but I was unable to categorize with out purchasing the pro version. I hate that I have to buy a plugin for only two products, but so it goes.
In addition to being limiting, the Role portion of your plugin was a little confusing to me as a new WP, ecommerce person. Therefore, it looks like I'll be using the WooCommerce plugin since it is more cost effective than your plugin and doesn't appear to have that role/user portion to it.