My parner, who is a barbecue guru and great cook says that lava rocks are way better than ceramic briquettes. We are on about our 5th gas barbecue (patrner will barbecue in snow rain or hail, all year round) and think that they are great for convenience, also the food cooks more evenly and completely so you don't get "barbecue trots" (please excuse the vulgarity) other advantages is that there is no waiting for the charcoal to burn through (or light at all!!) less smoke, so less inconvenience to neighbours and its safer because you just turn the gas out and it cools in around 15 min, no burning embers to douse or worry about. Downside is the expense, also, if it matters to you, it is less "back to nature" and more "back to the future". The food is still yummy though.