I have used it for a while and it's not very stable or rather say "finished" yet (neither Mac nor iOS). But it's open source, so I'd favour it over, Bear, given a chance, which it resembles the most. So I just keep it installed and keep checking it once in a while.

Though I'd just be happy with something like nv (+ Simple Note + Dropbox) which is actively developed (Simple Note just for the iOS).