Totally different cooking situation as you only get bottom heat. But seems to last longer, easier to clean, and more halachikly friendly.
halachikly friendly.
R moshe fienstein said its a non issue and here in the USA its widely accepted, it didn't take long and it reached Eretz Yisreol and they asked R' shlome zalmen Oirbach if it's permitted to use he said no its a shaila of hatmona, they told R' Shlomo zalmen that its widely accepted in the USA he said he wasn't aware of it and he didn't want to introduce something new that could have a shaila but since its used by many he wants to discuss it with a different ruv and not long after he had a stroke and passed away, that's why its a sticky situation in EY
dont forget in order to have a din hatmona it needs to be covered six sides Top bottom four sides, crock pot only has 5.
@ChaimMoskowitz should you have any questions dont hesitate to ask