I've been looking at those and wondering if I could make a practical portable cooler with it. I usually drive 5-6 hours to hunt elk, and it can be pretty warm. My truck has a fiberglas cap and I wonder if a guy could build a large insulated box that pretty much filled the back of the truck and install one of these units in it. Would be plenty big, I would think,and you could still store stuff in it when there's no meat to cool.
They have instructions on their website on how to build a portable cooler. Airtight and well insulated is the key. Building it on a small trailer would be preferable IMHO because you can do a more permanent job of sealing it.
We have a small orchard plus we raise meat goats. I've been thinking about building something like this for fruit and meat storage.