Width of insert is 1/4 inch shorter than indicated on product details causing some challenge with installing the stovetop.  The burner knobs are solid constrution with an easy to see position indicator as you adjust the gas flow. The ignighters efficiently turns on the cooking flame and the knobs move easily to make sight adjustments to the flame level or easily turn off the flame/gas. Knobs are easy to grasp, spacing between the knobs is sufficient for cleaning the area, and this design is spacious from the burners so the knobs do not get warm from the heat of the flames. I also appreciate the spacious distance of the knobs from the edge of the cooktop. A negative feature is the dificulty to clean-off any cooked on oil-spatter from the chrome circular plate/washer on each burner.