my wife and i love this cooktop.  it looks great, it's easy to use, and it's easy to clean since the knob is magnetic.  we usually keep the knob on the fridge when not in use.  

one drawback is the sensitivity of the knob -- you might be turning it and nothing happens, then it jumps ahead 2 or 3 numbers -- so it takes a little finesse and patience.  

our cooktop is on an island with a downdraft vent.  unfortunately, samsung did not offer a downdraft vent option, so we bought a telescoping one from a different manufacturer and it fits well with this.