I don't have much experience with Scrivener, but it came up when I was looking for writing software, and clearly it's very popular.
The reasons I ended up rejecting it were, mainly, lack of Android and Chromebook/Linux support and lacking sync capabilities (looks like there's Dropbox and iTunes sync support now). The pricetag seems reasonable, though.
After a lot of searching, I ended up with Obsidian, and love it to bits. It syncs flawlessly from my Mac desktop to my Android phone and my Chromebook, it has a superb plugin development community, and seems to be able to do almost everything Scrivener does, but for free.