Weber has revamped their Genesis line of grills for 2011! The control knobs have been moved to the front for easier "zone" cooking and more side shelf space. Another improvement is the double walled lid to improve heat retention. Two heat deflectors have been added under the burners which also aids in achieving higher temperatures. As always, a high quality cast aluminum cookbox and stainless steel burners will stand up to many years of high-heat usage.