Laggy, slows down the page by several seconds, which is a huge amount of time and people don't want to wait forever for a page to load.
Also, no discernible difference between the "Slide in smoothly" option and, "Just appear." Due to the lag, they both appear the same way.
If you + your customers can handle that, the simple user interface install/set-up is super simple.
However, will be uninstalling, unfortunately.
Nice design and it's free!
One thing that would get this app 5 stars is if I could chain together the banner types to show announcements while browsing, free shipping countdown after a product is added to the cart and then the discount banner in the checkout.
I would also like to see the option of expiring each announcement message individually.