Best plugin among others that have similar feature

I tried quite a few plugins that function like this plugin such as Booster plugin. But this plugin allows you to optionally display the message on “Add to Cart” notice which isn’t doable with other plugins.
This plugin is now also compatible with Aelia Currency Switcher with Shipping Pricing add-on. We had to display amount left for free shipping in multiple currencies where minimum amount for free shipping were set manually per currency. At first, the two plugins were not compatible but within 24 hours of request, the plugin author released an update that made both plugins compatible!
Thank you!