I didn't know that such a facility existed.
From my (our club) point of view, it would enable a member to take a copy of the registers that we have in the library and produce their own physical book :
http://www.blurb.co.uk/pdf-to-bookGiven a bit of cleverness (and Tim gave me a tool to do this) you can add PDFs to PDFs to create one big PDF for one big 'almanac' of the club for a given year ....
I may 'invest' a tenner with one of the database listings and see what they look like ....