Bests & Worsts Reviews from Amazon

I received the True Induction Cooktop within the promised shipping time. I knew that most of my stainless steel cookware was non-magnetic and not suitable for induction cooking. I have two cast iron frying pans, one is 10" and the other is 14" in diameter. I tested the cooktop with the 10" pan (which seemed to be the optimum size for this unit) but the cooktop only blinked its display indicating an error condition. I then tried the 14" pan and was able to get it to heat the pan. I put an inch of water in the pan to test the size of the heating area. I was very disappointed to discover that the diameter of the boiling area was only about 4". This cooktop was listed as being suitable for pans up to 10" in diameter but I never could find an actual specification that described the size of the induction element that is used. I concluded from my testing that this unit uses a ~4" coil like the other low-end units that sell for half of the price of this one. I sent the unit back and received a full refund including my shipping both ways. I subsequently purchased a 30" Bosch induction cooktop which has one element described as 11". It creates a boiling pattern at least 11" across in my 14" pan. My main complaint is that the True Induction cooktop literature is not specific about the actual size of the heating zone and the impression is created that it differs from lower-end units by having a larger heating zone.