Bests & Worsts Reviews from Amazon

After canning for years with two 7 quart units I purchased this "top of the line" unit from Amazon. Working with the All American help line for about half a day, we tried every tweak they could muster. After eight consecutive failures to seal, the correct response from the company would have been: "we are sorry this unit isn't working, we will send you a new one. The response I got was: "send it to us so our engineers can try to make it work." Now I have spent the better part of a day and am exactly where I started, unit sent back to Amazon and two, tried but true 7 quart canners. A whole lot disgusted.