Hugely happy about thick methal pot ! The material of the pot should be thicker to retain more heat. The larger the pot, the thicker the material should be. If the metal is too thin, it will not keep the heat and the heat will not spread evenly. all fitting not leak or required replacement, the copper pipe is clean inside. Was easy to assemble and worked like a charm. im going to buy one more this W.distiller ! its well made with good material.