The egg comes with a lifetime guarantee, I think... the company stands behind it. Look on their site (www biggreenegg com), and you can get great deals on demo units used at Eggfests. They get used for a weekend, and you take them home, saving hundreds, still with the guarantee.
I just got an XL, and used it all day Sunday. Using about 7 lbs of lump charcoal and some wood chunks, I first baked French country bread, then grilled scallops, then smoked a prime rib, then baked puff pastries. I've never used a unit that would do all of that so well and with so little fuel.