The end-user will be happy,
since he can create or
modify pdf layouts himself.
The software developer (you!?) will be happy.
Your job is not much more than to send a hash
and fetch the generated document.
you won't need to do boring layout changes. :)
The business owner (you!?) will be happy since
generated documents finally do look professional and as expected.
Development costs go down, your programmer is happy and your
end users will stop complaining about pdf generation.
Support for header, footer, page numbering and all the nice stuff that modern text processing offers.
Page long tables will break as expected.
Not limited to text. Embedding of images is also possible.