Thank you for your feedback and review on our Timberline XL. We understand that temperature swings, errors, and the pellet sensor not working properly can be frustrating. Traeger grills cook on an average. This means the temperature will fluctuate above and below the set temperature throughout the cook, but the average temperature is very close to the set temp. One of the great new features of the new Timberline grills is the increased level of error interaction with the customer. The new motherboard can detect issues more accurately and efficiently. Additionally, the larger display offers the opportunity to provide detailed feedback and instruction for each error the grill populates. The Traeger Pellet Sensor allows you to check the status of your pellet level remotely using the Traeger app. Which monitors the supply of pellets by communicating with the motherboard the level of pellets remaining in the hopper. Once selected from the menu, it will display the current level of pellets, in 5% increments. Your grill comes with a 10-year limited warranty. Please do not hesitate to reach out to us from 6 AM - 10 PM MT, 7 days a week, and one of our team members will get you squared away.