Byword is a clean, simple markdown/plaintext editor. There are a couple small bugs, like how tapping at the bottom of a scrollable note to bring up the keyboard puts the cursor in the wrong spot. But the biggest issue I have is with the lack of recursive search. Searching only looks in the current folder but not subfolders, making it a time consuming process to find anything if you organize by folders. For such a central function, this is a big limitation.
Squidouche about Byword, v2.6.4