I use it on my Kobo Libra H2O, it's great. I love the Calibre integration that allows me to sync up with my library on my desktop in just a couple clicks and taps.
1. I already have an ebook library in Calibre that I access on other devices, the sync feature allows me to seamlessly integrate into my other devices.
2. It's highly customization, almost every aspect of how books are displayed is able to be modified.
3. Progress can be synced across many devices without having to rely on some proprietary provider like Kindle.
4. Along with #3, you can get KOReader on many platforms to have the same experience anywhere (Android, Desktop, E-Reader). If I wanted I could push progress from my e-reader and then continue on my phone.
5. Easy shell access allows hacking and general tomfoolery. I don't use this much, but having this available makes me happy.
I could probably list more, but I'd need to refresh my memory on the core software (I've been using KOReader so long I've forgotten much of the original kobo interace).
> 1. I already have an ebook library in Calibre that I access on other devices, the sync feature allows me to seamlessly integrate into my other devices.
just out of curiosity: I sync my Kindle with Calibre in a very seamless way, too. what is the main difference here?
If you are referring to syncing over USB or sending via email, that's the difference. Calibre can be run as a service, allowing KOReader to access it wirelessly. You can copy books and sync the progress back to Calibre for sharing between devices.
Same, I also find that point of his perplexing as I could always sync my Tolino (German Kobo clone) to Calibre out of the box without any third party tools or hacks.
Yeah, they're the same reasons for me, but I'd like to say that depending on your use case, some stock firmwares are ok.
Recently, my father bought the same eink device I have (Kobo Clara HD), and I promptly installed KOReader only to realize that the stock Kobo firmware (which, btw, you can and should update even if you use KOReader) is perfectly fine for him, and in fact better for his experience than the enormous amount of options and menus that KOReader offers.
For me it's KOReader all the way, as I love the freedom, the fine-grained configuration possibilities, the connectivity. It's great that it exists.
For me, the most important differences are support for cbt (tar) comic books, a file system style browser and the end-of-file prompt to open the next file.