I realise ergonomics are a very individual thing, what one person likes another won't. But I am finding my Libra Colour more comfortable than the libra 2.
I tend to hold my reader by the wedge end on its side. I rest my thumb on the top button, and use that to turn the pages. My Libra 2 seemed to have more of a pronounced curve on the wedge, ending in a more pointy edge. My libra colour doesn't have the sharp edge, and that feels nicer to hold. It is also a bit lighter, it feels to me, and it has snappier buttons compared to the more mushy button on my Libra 2.
I haven't noticed much of a problem from the greyer contrast and I've been reading at 5% light. I haven't tried it outside yet: maybe this weekend if the weather is nice enough
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