Has anyone used one of these?

I'm looking to streamline my MacMini / smart TV interface somewhat, and this looks like it could help. The current Harmony Ultimate means I have the hub already, so I can scroll through the menus in PLEX etc, but I'd like to be able to type when applicable.

I see they don't ship to NZ... but there are ways around this, obviously.
However I did notice that some discussions online talk about certain Harmony products only working in certain regions (items purchased in Europe won't work correctly in the US due to incompatibility with hubs etc). Can anyone shed light on this?