The Simplenote/nvALT sync issues recently scared me away from Simplenote sync. I use Byword on the Mac and iPad, and Epistle on Android to sync notes with my Dropbox account. PlainText is also very good for this. I haven’t had any problems since going Dropbox-only.

If you’re a plaintext geek, read Mr. Blanc’s post to get a good overview of options from someone who knows the subject very well.