Not responsive at all. Keeps full table with multiple columns in mobile or smaller screens, so user cannot see pricing.
Author response
Plugin is responsive, you can test this on demo site: http://quanticalabs.com/wp_plugins/css3-responsive-web-pricing-tables-grids/ If you need help with setting responsive modes, please create new topic on our forum: http://support.quanticalabs.com and our support team will help you. You can also find help in general FAQ section about responsive modes here: http://support.quanticalabs.com/forum/topic/14974/responsive-mode-configuration