I love my genesis e-320. Have been cooking on it a few times a week (or more) for the last 4 years. I have not had to replace anything. The best gas grill that I have ever owned. I expect to have it for many, many years. Btw, the green color cooks the best!!!
18.5 WSM, Green Weber Genesis320, Cast iron firepit(w/grill), and a Copper Weber 22" OTS