The double click protection is broken as well as much of the CSS with the latest wordpress. Looks like the author isn't providing support any longer as the recent posts go unanswered. Sucks, looks like it would be a great plugin.
This plugin is just what I was looking for, answers all the needs I have, and does a great job, no bugs detected so far.
I absolutely recommend it!
Thank you guys for the awesome job you've done on this plugin 🙂