The more I think about the possibilities the better these things sound.
I have been thinking about converting an old fridge to fermentation chamber. That would cost at least 50 bucks for a controller, plus possibly a free frige. Plus a good bit of work to convert it plus random materials and electricity to run it.
This look simple and effective. I'll take 2. But get these out ASAP. Temps hitting 85 here today.
Also - Looks like the size could work for a corny. Take one of these and a corny, ice and picnic tap and you've got a protable keorator.