Since the Honda rear trunk is a Givi anyway, why are you more excited about this one? Seems like a different route to get equivalent storage that is not as well designed to match the aesthetics of the bike.
For one thing, it's not a luggage rack but a mounting plate for Givi top cases as listed in the PDF file. For another thing, it's not a luggage rack but a mounting plate so it's not likely to match the lines of the bike but must match the bottom mounting for a Givi top case.
Really wish it WAS a luggage rack. I don't really want a top case just yet but I do want a luggage rack. This bracket looks to be much more beefy than the luggage rack/bottom plate setup from Honda for the Honda top case, meaning it will carry a little more weight maybe. Has an extra mount point at the rear bungee cord bolt under the grab rail. Maybe I can get just the bracket pieces and make my own plate to span between them for a luggage rack! I could shape it to match the lines of the bike that way and it would satisfy my desire to make my own stuff to add to the bike