Yeah, FWIW you will hear a lot of "it works flawlessly," and "don't see what YOUR problem is cause it is EASY..." Well, that may be true for some folks but there ARE lots of people having significant and difficult to solve problems (myself included). iCloud seems to work really well for the native ios stuff but it has major problems with iwork syncing. Pages seems to work "best" with icloud but Key and Num have even more serious bugs.
Personally, I have decades of systems building and programming experience and I was and am unable to get iwork to function properly (read: at all) with icloud and syncing with my iphone 4 and ipad 3g (both ios 5.1.1). Despite the Apple requirement of only ios 5 the geniuses (multiple) at the Apple store kinda shrugged, admitted their product failings and suggested an ios6 update (not OK for a number of reasons). Basically Apple doesn't stand behind their software offerings the same way they warranty their hardware.
BTW, the "geniuses" repeatedly recommend Dropbox despite their corporate marketing that if you buy iwork then icloud will sync your workflow... Go figure.