A good plugin, backed by a very responsive developer

The plugin works well, supports without problems WP Super Cache and – last but not least – the developer has been very prompt in responding to support issues. I have been using this for 3 years now and I strongly encourage anyone to consider also the premium version, which adds a ton of useful features.
To make this plugin perfect, I would love to see some templates for popups available as a starting point, hopefully it is a feature that will be added in the future.