I have used this cooker at least once a week for two years. I recently had a couple of issues with it going out and was thinking it was having a serious issue. Quite frankly as much as I use it it should be worn out by now. Here is what I discovered. Carbon had built up on the tempeture probe and the grill wasn't getting accurate readings. Suspecting the temp probe I checked it with an external one and it was off 50 degrees or more. I am assuming that the readings were off enough that the grill controller just shut it off kind of a fail safe? 30 seconds with steel wool and we are back in business.
There is a bit of a learning curve when cooking with pellet grills. This unit can smoke, grill or bake similar to an oven. The Traeger smokes at 180*, but can cook up to 450*. It is indirect heat, so you can grill a ribeye without flare ups. My unit holds temps within 5+/- of the setting. Yes, you do have to clean it like a fireplace, it doesn't run on gas. The build quality is amazing, especially for a PRC manufacture. If you are interested in a pellet grill, buy a pellet cookbook. Something that gives smoke and cook times for an easier introduction into pellet cooking. The only knock against the unit is that for $800 it should have came with the "optional" folding shelf...
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.