Installed for about 3 weeks now and I've still not got the knack of lighting the burners without holding down the control knob to keep the piezo lighter clicking away for a long time. The control knobs are plastic and I'm slightly concerned they will melt if using a wider pan on the right hand front ring, I have not been able to find a replacement set online yet just in case. On a positive note the control of the gas for simmering is very good as is the pan stability on the cast iron supports.