At the moment the Slide In plugin is good but could be better.
The condition options for "Show message on:" are a radio set which isn't good as there might be cases where you want it to appear on "Posts" post pages AND "Pages" post pages.
This would then exclude any custom post types which I was wanting to do whilst allowing my slide in to be visible on all other pages.
If I use the "any of my singular pages" option I see the slider on my custom post types and that isn't the behaviour I want.
If the conditions was check boxes I could effectively mix it up as needed.