Looking for recommendations/information/opinions regarding thermal cookware like Air Core, Kuhn-Rikon DuroTherm, Thermos Vacuum Thermal Cookers, and the cheaper Sunpentown. -- These are the kind of pots that have multiple layers of stainless steel (or a second, outer, insulated container the stainless pot can go into), and some sort of vacuum sealing method, so all you have to do is heat ingredients, seal them up, and they cook as if they were in a slow cooker, but with no electricity or additional heating required.
Do these things really work? And, if so, do they work well enough to thoroughly cook things like short ribs which would normally take a good 3 or 4 hours on the stovetop? If so, what are the best brands? And I've read some reports online of AirCore pots exploding. Anyone have any experience with that?