If you read the instruction manual you will learn to "burn in" this oven OUTSIDE" before you cook in it. It should be turned on high for one hour and allowed to burn off the protective oil used in manufacture. It will SMOKE. After that ...NO Problems. Everything went just as described in the manual.
The power cord for any appliance with heating elements is always short for safety reasons. I placed the oven on a make-do table under my covered patio and used the same power extension cord I use for my table saw, grinders and other heavy duty power tools. After one hour with this oven on constant max power the molded plug and wire became soft and hot to the touch. I say this only because some people will try to use a standard household extension cord and could possibly start a fire. I have only two other minor issues. 1) The cooking well came with a paper information sheet glued to the bottom. I could not scrub the glue off. I finally used some industrial solvent to remove the glue and then had to wash the whole thing again. The cook well will not fit my sink. 2) This oven is big...I mean BIG. I do have a problem finding space near a plug to use it in my "normal" sized kitchen. And I have not solved the storage issue...yet. All in all...I would buy it again. It does a job nothing else will do.
Sidebar: One of the selling points is that you are baking in a much smaller space than when heating your whole oven and therefore you are using less power and saving money. I am not an electrical engineer, but I am not so sure about that. You are using 120 volt power, not 220 volts and therefore drawing twice the amperage.