Windows and Mac only (no Linux).
While I love a good piece of hardware with real buttons, I struggle to justify the money on this. If it supported Linux and was a bit cheaper I might splerge just to have a toy, but I'm definitely not switching to windows or mac just for this.
You could probably easily get Codex (CLI) to vibe code Linux support tbh. It's probably just a regular USB HID device. The main problem is that right now it only works with the GUI Codex App which doesn't have official Linux support.