I love the simplicity of Sandbox. Thanks for writing about it, Sarah!

I wanted to quickly create, modify, and checkpoint clones of an existing WordPress site, and developed an approach based on the Duplicator WordPress plugin for backups: http://gear11.com/2014/01/wordpress-docker/ Duplicator provides the same kind of "2-clicks" approach as Sandbox, but the cloning process also requires a Linux server (or local virtual machine if you run Windows or Mac) on which to execute the copy. The payoff is that once you are past the setup, you can quickly spool up a clone of any site just based on the Duplicator backup package.

I'll have to work hard to get it down to "2-clicks", but Sandbox provides good inspiration.