No, but it does look very similar to the 'Rocket' cooling stem that's used on the Tinymight 2, IMO. So a lot of my thoughts below will be based on that, accurate or not.
I opened the link, but didn't see where this fits in -- right behind the oven, or after the stem, replacing the mouthpiece -?
In either case, to drop it on anything but a carpeted floor is probably grounds for breakage. It's why I don't use the corresponding one in my TM2 -- not enough extra cooling to risk the extra glass / stepped down neck, while also being more difficult to clean than the 'missle' stem (which can be opened / emptied.)
Personally, I can / do hit my Dani (w/ long wooden stem) natively more of the time, vs even using it in a WP.
Outside of a more ergo mouthpiece, I'm ok with the functionality of the one Dani I have, and wouldn't really be looking for more cooling, via this item. But if one has a short wood, or metal stem Dani, they might be interested, perhaps?