I agree, I opened that PDF and the first page has two off-centre lines... not particularly impressed. And the line heights and kerning are all over the place. It's actually straight up terrible. Sorry, OP.
Thank you for the gentle reminder that we might be well-served to examine more than the output. It is v0.9.0, after all. It was easy to say, "what is this!?" and start looking to find bugs/mistakes, when what's more interesting (to me) are the (planned?) placement of its capabilities with respect to InDesign and TeX.