@Uncle Robin: Yup. Most people that are fine with their current reader don't need to use KOReader.
Anyways, KO is a power tool, not exactly consumer friendly, but all these things can be enabled or disabled at user will. That's the whole point of it.
Some screenshots about the style tweaks feature that could give you a hint of the tweakable nature of that specific feature:
1. landing page of style tweaks
2. text tweaks
3. misc tweaks
4. misc tweaks -> footnotes
And that's is just a part of the picture. There're plenty of things that most users won't need (including full text translation, html/css viewer, user specific style tweaks, reading stats as the screensaver, the ability to apply different css styles based on the path of the file or changing a bunch of settings with a single gesture. These to name a few)
For most people I know recommending KOReader as a reader is almost the same as recommending GIMP as a picture viewer. It is a bit overkill and there're simpler, easier, better looking tools to do that job
