iCloud Mail - Is It Just Me?

Am I just unlucky, or does it simply not work on iOS devices?

Every few days, I'll switch it on on my iPhone and iPad and watch it do pretty much nothing at all. I get the headers, but no messages ever download.

I see plenty of discussion on the forums from people with the same issue, but there doesn't seem to be any definite way of making it work.

Surely, if I'm not an isolated case (and I'm not, according to all the forum posts), this is a big issue, yet nobody seems to be making much of a fuss about it.

What am I missing?