Fits perfectly, heats evenly. Using shipping carton to store grates or griddle when not in use and that seems to work fine. High quality, I ‘ve been using Weber products for over 50 years and have never been disappointed .
I was really happy that I had purchased this accessory. It adds some options for different recipes. Grilled veggies, mushrooms, cheese steaks, smash burgers to name a few - without buying a whole new flat top. It heats up quickly and maintains a fairly consistent temperature across the griddle. There are a few down sides, first there some accessories like a flat iron that need to be included as well as a IR thermometer both for seasoning and cooking. Since the griddle is an add on the grease containment was a challenge when I cooked several burgers and bacon for a small group. The surface area was more of a challenge than I anticipated - sending a few hash browns in the air. That said it is a nice addition when I am only cooking for 3-4 people.