It's even rebindable. I bound mine to something completely non-intuitive (keybindings for canto), so it's + to upvote and . to go to the next one. Or you can set it to hjkl, or arrow keys...
Uhh. Well. I actually don't use it anymore, I use the alpha version I'm developing which, ironically for this post, doesn't use a crontab based fetch (although it could).
Anyway, my only suggestion would be to read the configuration docs. It can basically do anything, if you've got enough Python chops, but for common reader functionality it shouldn't be too difficult to get the hang of.
Especially don't miss the section on filters. I don't think I could use it without filters = [ show_unread ]
in my config.