Been using it in a few projects to generate reports and invoices straight from a web screen. Being able to build the layout like a normal page saves a lot of time compared to other approaches. Only thing is page breaks and headers/footers take some trial and error with CSS to get right, and the first generation can be a bit slow. Once it's tuned it just works.

Works well, definitely could use some descriptions in the code. 

Functionality that should have been in the core product!!!