****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.
To start using the grill, pour wood pellets into a hopper (pellets are usually are made from compressed sawdust). Press the start button to ignite the pellets, which are fed into the fire box with an auger, where a controlled number of pellets are lit and burned (depending on the temperature setting selected). The auger adjusts the number of pellets entering the fire box to maintain the desired temperature.
You are worried about flare-ups: When grilling fatty types of meat on a propane grill, you run the risk of having flare-ups, where the flame gets too high and too hot, burning the meat. You have to keep a close eye on the propane grill to guard against them. But with the Traeger grilling system, the even distribution of the heat and the indirect heating system prevent this problem.
Spent thousands on Traeger, they are ok. Wouldn’t have an issue if they were only $500. But the last one I bought, (Timberline 850) cost $2500 Canadian. Almost burnt my house down because it got over 600F and was still climbing. All Traeger does is mail you more Chinese parts to fix your China made grill. By the end of it you will know your Traeger in and out because you WILL have to take it apart to repair! Overpriced for a smoker with many issues. Timberline lower grill has a portion of the grill removed for some kind of design. They added a 1/4 lip to justify this Grand Canyon of a hole in the back of the grill. Well needless to say if you cook wings or something small and toss them around you will for sure lose the wings to this big stupid hole. But they said they pit the little lip to stop the food from falling... Do they not test these products?
You want to easily switch to different smoky flavors: Changing flavors in your Traeger grill is as easy as changing the pellets that you place in the hopper. Through its website, Traeger offers several different smoky flavors of hardwood pellet offerings, including hickory, mesquite, apple, maple, cherry, and oak. And Traeger’s website provides information on which types of hardwoods provide the best smoky flavor for certain types of foods, which can help you successfully use this grill immediately out of the box.
Wood pellet grills are a great addition to any home because they combine everything you love about a smoker with a standard grill. Depending on the model that you buy, you can make smoked dishes like brisket and sausage at the same time that you make burgers, hot dogs and other dishes on the grill. These grills are great for family dinners in the summer and for parties and special occasion celebrations.
Compared with charcoal and other wood-fired grills, pellet smokers are simpler and cleaner and easier, giving more control than traditional smokers. Wood pellets are dense, burn hot and smooth, and can be easily fed into the flame with an automatic auger, allowing for consistent temperature with minimal effort. Many modern smokers let you practically set it and forget it, thanks to their digital controllers. Pellet grills are also efficiently cheap, often using as little as 1lb of pellets an hour.
Wood pellet grills look like standard barbecue grills but some with a separate firebox for making smoked meats that will also let you smoke vegetables and other ingredients. As Traeger and Pit Boss both get good reviews from customers, it’s important that you look at the top features of this grills and how each company compares in relation to those features.
I think a lot of reviewers here don't have enough experience in pellet grilling to recognize how many features are packed into this unit for the money. I'm not going to talk about the usual advantages of pellet grilling in general in this review (i.e., clean flavor, "set and forget", less ash,). Instead, I'm going to focus on what makes this one uniquely better than the other grills in it's class.

Get fired up about wood smoke flavor. The Get fired up about wood smoke flavor. The A-MAZE-N Premium Wood Pellets are 100% Oak with Italian Spice added for extra flavor. Perfect for adding that delicious smoke flavor to any food you crave - meats cheeses veggies and nuts. A great choice for cold or hot smoking your favorite ...  More + Product Details Close
You like the idea of cooking different types of foods on the grill: If you’re someone who wants to grill food other than meat, the Traeger grilling system gives you this option. With the precise temperature control of the Traeger, cooking things like fruit pies can be a successful endeavor, something you wouldn’t dare try with a propane-fired grill.
With 341 square inches of cooking space and a digital control board that sets the temperature from 180 to 500 degrees, you’ll be cooking whole meals in this grill, even though it’s the smallest model that Pit Boss makes. It will hold up to a dozen burgers for parties, or a chicken and vegetables for the family dinner. When cooking is done, the porcelain coated grill grates are easy to clean.