Just getting my head around iCloud Drive here ... My main unresolved question is around working with PDFs (and really I guess other text docs) between my iPad and my iMac. Everything I've so far read suggests that iCD should work roughly like other cloud services, so that I can read (and annotate / edit) the same file on my iPad and my desktop – as distinct from working with a separate copy on the iPad. But that doesn't seem to be what's happening (except with iWork docs). I already have GoodReader on the iPad, and I have the latest update with iCD support. So I figured I'd be working with the same PDF files, a la with Dropbox sync in GoodReader. Instead there's no (as far as I can see) option to sync with iCloud; only an import function. Result: GoodReader on the iPad now has duplicate copies of the original PDFs stored in iCloud on the mac. The originals are in a Finder folder "iCloud Drive" under ~/Library/Mobile Documents on the mac, and they appear as loose items at the top level in the Document picker on the iPad. The duplicates appear in the Document picker under a "Good Reader" folder (i.e. one level down from the originals). And they're not even viewable in the mac's Finder – even with invisibles unhidden. (But as it happens I can view them in Leap – a Finder substitute I've had for ages; and there they appear in a "GoodReader" folder at the same level as the "iCloud Drive" folder where the originals are.) In other words – unless I'm really missing something (quite possible ...) I'd be better off sticking with Dropbox as far as any documents except iWork files. Can anyone correct me? Thanks.