Turbo trainer cooling - Sony Reon Pocket 3 - "Portable Air Conditioning"?

Just came across the Sony Reon Pocket (now on version 3). It seems to be sort of like an ice sock down the back of your jersey (comes with a neckband and goes behind your neck tucked into your shirt) - just wondered if anyone had used it in a turbo training setting? I doubt it does a huge amount of objective actual cooling but am intrigued if it might give that subjective ‘aaaaaah’ cooling moment which can sometimes get you through? Seems like mostly marketed in the (obviously) hotter Asian countries. Just some links I found below:

Interested if anyone has used one at all? (NOT an April Fool’s post!)