I made the jump after 8 years of contentment owning the E-310. In fact my E-310–with a upgraded stainless grills is still working great. But I always wanted a side-burner. We do a lot of cooking outdoors. And now that I own this monster, I never have a reason to cook inside! I always thought I was pretty good at grilling, but this unit makes it easier and better. I think it has a lot to do with the size. With a larger volume of space under the lid it’s easier to maintain the perfect temperature. It’s so powerful, I’ve been roasting on the fold-out grates above a lot, and I’ll let the juices fall on the roasted potatoes below. If you’re thinking this is too-much grill, it isn’t. It’s the perfect size for cooking an entire meal—for 2 or for 10!