Comment by bayindirh

When using Kobo readers, using Calibre and Kobo utilities, which transparently "upgrades" your ePUBs to KePUBs without altering the copy on your disk is a must, and a huge win.

Kobo's added features on top of ePUBs are nice, and their renderer is much better than Adobe's standard pipeline.

So, it's a free upgrade with a terrific local library added on top.