Does that transfer the data over iCloud (via the internet), or over Bluetooth and local WiFi? The page is kind of ambiguous since it mentions all 3.

> copy text, images, photos, and videos on one Apple device and then paste the content on another Apple device

So not so much for my Linux box or my Android phone, then. As usual with Apple's shiny crap it "all just works" as long as you're only playing inside the walled tarpit.