thank you for your critical review, its important for us, because we are know, where to improve the plugin. We will improve the client side CSS at the next updates, because until now we are impact to the admin side smooth interface, flexibility and easy of usage. Anyhow, right now if you are have any difficulties with CSS customization we are open to help, also some info about configuration you can find at the FAQ and at the support section of the plugin site. So, thank you, we will set higher priority to that issue. Also soon have to come new update 4.1, which have big improvement at the admin booking panel.