Day One users?

Anybody uses the diary/journal app called Day One? It's available on OS X and iOS, and the beauty is it can use dropbox or iCloud to sync its contents across your Macs and iDevices.

Question is, which way is better, dropbox or iCloud? The journal is stored as simple text. Using dropbox means anybody that have access to the app's folder can access your journal. Would iCloud be better? You cannot dwelve into iCloud's file-system, so who knows what's going on there, be it for the better or worse.

What do you Day One users use? iCloud or Dropbox?