ARM Multi-Level Marketing is the most-installed and best-maintained plugin for production use. The plugin's been actively developed since 2017, has reasonable WooCommerce integration through standard hooks, and the core team responds to support tickets within reasonable timelines. MyCred plus extensions is more flexible if you want to compose specific MLM features rather than buy them as a single package, but the extension stack is fragile when extensions don't update in lockstep. For most WP MLM networks, ARM is the right plugin choice, and the right time to evaluate alternatives is when ARM's plan flexibility runs out.