Just got around to installing 5.6.5 on my Voyage. Wow, to use an American saying, Bookerly really blows chunks! That is, it sucks really, really bad on my Voyage. I was hoping for something much better. Comparing it to both Caecilia and Caecilia Condensed, both of which are fairly dark on the screen, Bookerly seems thin, faded, light grey, and just becomes too difficult to see on my Voyage's somewhat murky screen. Bookerly works okay on my iPhone and iPad where it is as dark as Caecilia, but on my Voyage it is too thin and light to be usable. It would cause too much eyestrain. I'm sticking with Caecilia Condensed.

ETA: I like and use Bookerly on my iThingies. But Amazon shanked it for the Voyage. Major fail!