It has been a while but I've mucked with ArchiveOfOurOwn a bit... here are some random observations I made the last time I used it.
Striked me as a bit of a odd mishmash of FanFiction.NET, MediaMiner.ORG, and FicWad.COM feature sets.
The direct link system is a bit convoluted, in that you can have multiple links in differing formats take you to the same information.
Basically boiled down though, you do have site, story, author and chapter links available as link options. There are category links as well, but I do not think it has crossover category links, or not that I'm aware of (It does support crossover category tagging, just not crossover category links).
If you have a NC-17 story, or otherwise graphic story noted as such, it may force a log in on readers, or at least it used to.
There is a download option on stories, but it is useless for my own purposes so I do not use it... It does not offer TXT as a available format.
Like FanFiction.NET, links from it can, or at least used to, be able to be fed into downloaders like FanFictionDownloader.NET.
I think the tagging is potentially better than FF.NET, but I find it overused. Which to be fare, is an issue in some cases even on FF.NET these days.
One detraction for me is as far as I know, it does not have RSS or ATOM feed support. It does have a subscription mail update system like FanFiction.NET for author and stories. Worthless to me as I would not want near that much email. Feeds are much, much, better.
All that is from a reader standpoint and a pure technical standpoint though, and you may not care about any of that. How that translates as an author experience though I could not say.