I have owned many Weber grills over the past years.  The grills have included the Smokey Joe, Kettle Grills, Q propane gas, Q electric, and Spirit Grills.  This Spirit S-315 Gas Grill is possibly the best Weber grill that I have purchased.  The speed of heating is excellent.  The ability to control a constant  temperature is very good.  The grill plates are an improvement over my previous Spirit Gas Grill which I left in another state due to moving.  Cleaning the grill plates is very easy and effective.