I have had this cooktop for almost a year and I love it!! I do not use the knob, I just use my finger to control the burners, I think it is easier that way, especially if I have multiple burners going on at the same time. I love how fast the power boost can boil water. It cleans so easily. I have never had a problem with any of my pots or pans connecting to the cooktop, and I love the select-a-size feature on some of the burners!