The only real free plugin for role based discounts

Among many plugins of this kind I tested in order to get one doing its most basic job (discount based on user-role), this is the only one really working in its basic (free) version. At first, make it working looks a little complicated, but you are guided in doing that by the setting flow itself. I repeat myself: if you are looking for a free plugin to make your WooCommerce store offering discounts to registered users (based on their roles), this is the only one you should invest your time in make it working, and it does work!