#WritersCoffeeClub 28: Table of Contents?
I prefer it. And for an online serial, it's kind of a necessity, because it can include a direct link... you can jump to the more recent part without having to page through the prior chapters from two weeks ago.
There's also the fact that the chapters tend to need names if you do it, which I also tend to prefer (versus just numbers). As always, YMMV.