A very neat idea. It’s definitely trying to trigger my Gear Acquisition Syndrome
From a technology perspective, there’s nothing super ground-breaking, meaning I don’t think it’s bullsh*t. It’s a small chiller like an office water cooler or dorm-fridge would use, mated to a computer water-cooling rig, (which often use glycol) mated to an immersion chiller & thermostat. I think one of the things that mark a great invention is when you see it and think, “Damn, why didn’t I think of that!”
From a practicality standpoint, I would stick with the chest freezer and temp override. You can get both brand-new for a third of the cost. The chest keeps the beer in the dark, and provides a CO2 blanket, and a safe, easy to clean space in the event of inadvertent blow-off.
I also question the device’s noise level.