****Update 12/2014: So I finally found something negative to report. Today I was cooking 2 pork butts and a brisket and discovered that this grill does not do well with wind on a brisk day (It was 45 degrees here today). When set at 250 degree, the smoker could barely make it up to 190 degrees. I was able to bypass the problem by throwing a cheap moving blanket over the grill (an $8 fix) but I think it's worth noting.

Pellet cookers usually have an auger or another feed mechanism that pushes the pellets into a burn pot typically about the size of a beer can ripped in half. An igniter rod sits in the bottom of the pot and when you turn on the grill it glows like the element on an electric stove. As the pellets ignite, a fan blows to feed them oxygen, and the igniter shuts off. The Traeger L'il Tex, an inexpensive model, draws 300 watts an hour while the igniter rod is on in the first four minutes, then it drops down to 50 watts an hour for the duration of the cook session, less than a standard light bulb.
Is it customization? I called before I order my YS640 and told them I wanted my grill grates made out of expanded stainless steel, and a few other small things done to ""personalize"" my grill so it was just the way I wanted it. ""No problem. The added materials will cost extra, and shipment will a week so we can fabricate your grates."" Try getting that with a Chinese import!

Pellet grills preheat quickly, so you can start cooking almost immediately, and the pellets are available in a number of woods, for different smoke flavors. The smoke has a subtle wood-fired flavor with less of the acrid flavor that comes from standard wood or charcoal. For the maximum smoke flavor, it’s best to cook at a temperature lower than 250 degrees, while higher temperatures cook faster with less smoke.