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.
The wood pellet grill features a dual rack design with a 513 square inch main cooking surface and 187 square inch warming rack. With a 20-pound hopper capacity, the grill has plenty of space for wood pellets to keep grilling during long event and parties when you have many mouths to feed. An automatic pellet feeder makes it easy to maintain the desired temperature, so you can focus on just the grilling itself.  
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.
I've had it for right at a year as of the time of this review, and I absolutely LOVE IT. Normally I am of the opinion that you should overspend to get the better product, but I am 100% satisfied with the SE. I've gone through almost 200# of pellets in a year and I've successfully smoked three briskets, pork in various forms, a bunch of whole chickens, salmon, and probably some other thing I'm not thinking of. The show-stopped for me is bacon-wrapped dove breasts. I smoke them for an hour and then finish them on my grill. They are out-of-this-world amazing.
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.