-
Looked into this a bit. You're right that there are lots of cheap HDMI capture cards out there that look identical to the Atomos one.
Interestingly, the CineGearPro one has a different casing. I've seen comments raising concerns about the other models overheating, as they have a tiny heatsink inside and no airflow, and no coupling to the outer casing. That doesn't seem to be the case with this CGP one, which has vents, and I've also felt the case becoming warm when in use (which is a good thing, it means the heat is being dissipated through the outer metal)
I haven't actually used it for an extended period though, it could still break down after longer use...
99% sure someone on one of the forums took it apart and it showed the same serial / kits etc as one that cost a fiver from Amazon. Can't find link rn so take with pinch of salt but pretty confident I saw a thread somewhere. Maybe reddit.