The grates are fine.  They work well, bertter than the rest of the grill. This is my third Weber grill and it has the same problems of the other 2.  The ignition system on all three burners eventually needs to be replaced.  I am 78 yrsars old and lifting the propane tank and hooking it on to the grill so I can know the level of propane in the tank, is a real problem for me. I would like to see a better system that would not require me to lift that tank.