Before I bought my H2O, I did spend some time int he Kobo forum having a read to find out about Kobo. I didn't want a Kindle or nook so I decided to look into Kobo.
Most of us use Calibre to manage our eBooks and remove any DRM. This means we can by ePub from shops like Kobo and eBooks.com, We can also buy eBooks from Amazon and convert them to read with our Kobo.
Have a read of this thread. It also applies to the Libra.
https://www.mobileread.com/forums/sh...d.php?t=334173