A feature I would like to see in the table of contents is the page number where each chapter starts.
I don't know if I missed anything, but when reading a sideloaded ebook I don't know how far I am in a chapter. I might be a little on the OCD side here, but I like as much as I can to read until the end of a chapter before going to bed or starting doing something unrelated for a long time
On the Sony 650, it's easy to find (when the table of contents or the ebook is well formated). So far, no luck with the Kobo Mini.