I'm seriously considering adding a Libra, I love my Aura One and have had very few problems. (Originally purchased in Sept. 2016)
There is, what I hope is only a slight scratch on screen and not a crack in substrate. It is only noticeable if I really slant the screen in the light to look for it.
The Libra is attractive to me as a backup reader, slightly smaller so it may fit better for travel. As a 98% user of Overdrive, I'm very happy with the Overdrive feature on the One, and for that reason alone, keeps me looking at Kobo's for future Ereader devices.
I tend to fold the cover I use on the One for one handed reading, so the shape of the Libra looks good for one handed reading. I like the idea of buttons, that is the only thing with the One, the screen stays smudged as I read frequently. I prefer a smooth face screen like the One, but it isn't a big deal to have a raised bezel. The Forma is bigger than I need and more expensive than I want to go for a 2nd reader, so the Libra is attractive in that it is the same shape as the Forma, better price point and smaller than the One for travel.
Much to ponder as I wait for real life reviews