It's seriously cool, and you can script in it if you're up to it.

The only thing I wish it had was a way to import portions of a document like it was set out inline instead of their import and include approach. (Neither of which pull in variables in a friendly way, though it can be done).

It's workable, but it can be cumbersome for what could be simple if it allowed sed like injection at compile time by first producing a temp file.

You'll see what I mean when you start using import and include functions.