Michael Tsai curates and excerpts a damning collection of posts outlining developers’ problems trying to use iCloud.
I trust iCloud with my contacts because that’s one part of MobileMe that actually worked, but that’s all I use it for (by choice). I tried using Notes with iCloud sync once. I typed out an email draft for 35 minutes in it on my iPhone, then launched Notes on my iPad and watched everything I had typed disappear. I cringe whenever I see other people using Notes, I hope they have better luck than I did.