Without wp-typography activated the plugin load time is between 0,181 – 0,2 sec. per visit.
When wp-typography is activated the plugin load time is up to 0,7 sec. Furthermore there are more than another 60 MySQL-queries.
This makes my website loading way slower. My provider even had to move my website to another server due to experiencing these issues (which first came up just after using wp-typography) and slowing down the whole managed server. Might be only me experiencing this issue but that is what I can rate. I’d love to use it though.