As indicated by some other reviews, this griddle works fine with Weber Genesis grills, but there are a couple caveats I'd point out. I have a the three burner plus sear burner model of Genesis II that Ace sells.1) The griddle will sit on top of the existing grates. using it in place of the grate doesn't work. The dimensions aren't right.2) The front to back length of the griddle is such that the closed lid will rub a teeny bit against it. It doesn't interfere with closing it, but it does bug me a little.3) There's a fair bit of distance between the griddle and the burners. I run it with the right most burner and the sear burner going full blast. This works fine, but it's something to be aware of. I imagine a dedicated griddle like a blackstone can get a hotter surface. If you look at Weber's griddle made for the Genesis, you'll see the cooking surface is dropped down.4) The drip escape opening directs grease to on top of the center burner causing flare ups. Not a huge deal, but sub-optimal.The griddle is otherwise a very nice and hefty piece of cast iron. In retrospect, maybe I should have gotten a Blackstone. It would have given more more cooking area. Cook all the bacon, while making pancakes and eggs at the same time. Would also take up more space on the deck.As summer heats up, it's definitely nice being able to cook breakfast outside and keep the kitchen coolers.