Looks amazing. Don't know how I missed this until now.
How collapsible is it? Does it fold relatively flat?
Description says it "cooks or reheats". Has anyone used it for cooking? Can it cook raw fish?
Yes it flattens pretty well - it's a soft case.
The hot plate gets to around 150°F IIRC, and I've cooked raw food in it. Keep in mind that it will take significantly longer to cook, due to the low temp.