I used to love Scrivener, but eventually, my 7-year-old novel started to take 5-10 minutes to sync, among other problems. All of Scrivener's fancy export options turned out to be totally useless--so useless that I wrote my own nodejs conversion utility to ease the pain of converting my MS from Scrivener to standard MS format. Ulysses is simple and works great.
I did have a few problems importing my with filenames.
Here’s what to do if you don’t care about filenames.