Instruct: Classify a given Amazon review as either positive or negative.
Query: Manttra Electric Pressure Cooker

I tried two of these ... returned the first due to a screw head from bottom heating element protruding not slightly ... but enough to crease the bottom of the stainless steel pot. Felt this could be a problem in the future for a pot that undergoes pressure. Also, this unit would not seal. Top did not fit bottom of pan, regardless of gasket.Second unit I tried would, also, not even come close to sealing. Top turned too far and had to stand there and apply pressure to get my meal done. Luckily, could return this one also. Done with this model!!!