I don't have a lot of issues with bookerly on my Voyage. The "color" of it is the same as caecilia, which is what I used before. Its a tad less bold than that one I think. Hard to tell, might just be because of the different shape of the letters.
I would not be able to read a book on helvetica at all. I remember when they changed the kindle format I think to AZW3? back when. There were so many books that were wrongly formatted and they were stuck on helvetica, I could not change the font. I think the publisher embedded and it defaulted to helvetica. I returned and complained about several books like that. Just cannot read on that font. I think I must have the serif thingies.
But changing to it to check the "color" is the same on my Voyage as the bookerly, just that the letters are straight lines so appear more full, or whatever the proper term for that stuff is. Helvetica and caecilia look almost exactly the same to me as far as boldness. Not in look of course.
I have been reading on bookerly since they put it on, but I can also read on caecilia fine. But somehow with bookerly my eyes glide more comfortable for some reason. I seem to read longer and easier. Suppose that could be the books I am reading.
Bookerly just makes the page overall look nicer and more pleasant to read. But its not that caecilia is not pleasant. I have been reading with that font since 2008 after all on my kindles.
Remember the K1? It had one font. I read like a monster on that thing for 2 years.
