I have used the cooktop for a month now. The things my wife and I do not like.
 The cooktop controles are hard to read and adjust. They need to light up and stay lite so they can be seen when on.
 We both do not like the magnetic control knob its more of a gimmick. We find ourselves using our fingers to control the elements. The knob only works 50% of the time and is very frustrating.
The heat levels are 1 to 15 on the elements. 1 to 10 changes the elements about 20% and 11 to 15 the other 80%. 
The cooktop really doesn't get all that hot on 15 and it takes forever to boil water. I have exclusive Samsung appliances and tvs in my house and never been disappointed but the product development team on this cooktop did not know what they were doing.