Can anyone weigh in on the Gallery versus Kaleido screen tradeoffs? I understand Gallery has better color but slower refresh but don't know how big a deal this is for various use cases.

I have a Bigme Galy, that uses a Gallery 3 display, as well as a Kobo Libra Colour, which uses a Kaleido 3 display.

I regret buying the Kobo Libra Colour, solely because of the display. You pretty much need the backlight on any time it isn't in direct sunlight, and even then the contrast is worse than a first-generation monochrome E Ink display, and the saturation is pretty low. Monochrome text is also a bit fuzzy.

The Bigme Galy display works in the same lighting as monochrome displays, with nearly as good of contrast. Saturation with primary colors (cyan, magenta, and yellow) is excellent, and with secondary colors it's not as good but still better than the Kaleido display. Magenta is the most vibrant, so green struggles the most.

The Gallery display does take several times longer to refresh in full color mode, but it has a monochrome mode that refreshes at a similar rate to monochrome eink displays on ebook readers, so you get dynamically chose between color or speed.

Both ereaders have laughably bad software, so that didn't have a net affect on my preferences.