We purchased our wood pellet grill (Model TFB57CLB) from Costco in August 2017. It came with one bag of the gourmet blend pellets. We used the Traeger cookbook to try a few different recipes in the fall. Most of these involve a period of smoking followed by a period of grilling. The grill seemed to work fine at first. We used it a couple of times on warmer days in the winter and it had some trouble getting up to the desired heat level. We started using it regularly again in April 2018. I was careful to clean it and check the pellets etc. The smoking feature seemed to work alright, but when I would turn the heat up for grilling, the grill would usually struggle to get much over 225. I would resort to turning it up to 375 or more just to get it to 225 and then often it would sink back down to 180 or 160. I went to the troubleshooting guide on the manufacturer's website and checked all the components, which seemed to be working fine.
Although these are marketed as grills, they do much more, including baking or roasting. Because they heat by convection, you might not get the grill marks that a gas or charcoal grill will give you, but you also won’t have the flame-up problems. While many pellet grills offer high cooking temperatures, the maximum depends on ambient temperature and wind. Many users wrap their grills in special insulating covers to help maintain heat, reduce fuel use, and reach the higher temperatures they desire.