Overall I find it good. It could be better if the line spacing within paragraphs was more consistent. Currently it's too varying and feels unsteady. In the Berlin example the line spacing for lines 1 through 4 is much more than between lines 4 and 5. (I first thought it had to do with the footnote indicators but there is none on line 2. Maybe the IPA on the first line causes more line spacing below?)
Topic on Talk:Reading/Web/Projects/Print Styles
I think that is because it is a PDF of an older version. If you look at the staging website that it is based on, it seems that this was fixed. Although I note it was fixed incorrectly, for which i will file a ticket.
Related question: would it be possible to customize spacings between the paragraphs and before section headings? I find them too large and taking a lot of space. It does not hurt much if I create PDF and read it on the screen, but for travel guides, which may be printed on paper, space is a big issue.
You have a common.css, to which you can add CSS for your own printing, or MediaWiki:Print.css for something like wikivoyage.