Not much to see here, this was being given away for free on FB Marketplace, so I went and picked it up, it didn't come with the Chromecast though, and I won't be signing up for the service either. Here is the top and bottom of the box
The sides
The other two sides
It looks quite nice, but only works wirelessly with the Stadia service, it apparently works as a wired generic controller via USB though, but I haven't tried it yet
Interestingly it connects directly to the Stadia servers via wifi, and not via the Chromecast, I imagine this is for lag reasons
Update
I have tried and tried to get this controller with the updated firmware to be recognised via Bluetooth in Linux for use with Retropie, but to no avail, none of my Bluetooth enabled PC/Laptops can see it from a normal scan, I even bought a new Bluetooth low energy dongle as well. The closest I got was from the command line in Linux. I can "sort" of see it, but it refuses to connect, even with the udev rules in place
So back in the box it goes until someone figures it out
G - No room for line, 413:1