Google Drive, OTOH, works on Windows/Mac OSX/Android/iOS (and probably WP7, Windows 8, Blackberry, etc, but I haven't done my homework). Dropbox is another option.
Personally, I would never use iCloud. It's not because of trust, it's because of portability. What if I have an iPhone, then decide to buy a Samsung phone? I can't use iCloud on that device (AFAIK), so I'd have to transfer everything manually. What if I change from Android to Windows 8? AFAIK, Google Drive will still work.
If you're so bent on trust, then use Dropbox. It's much more portable and they don't really care about your data, just your monthly investment.
He's willing to use the iOS ecosystem and it satisfies his requirements and it's convenient for him.