Looks good. I currently use a Camp Chef pellet grill at the house, used pretty much weekly for the last couple years since I switched to pellets. The ease of use results in much more use for me. I've been debating getting one like yours for when I retire next year, and start using the 5er a whole lot more often.
As for what's in the pellets, providing you get the ones made for cooking rather than the ones made for heating, all you get is compressed sawdust from hardwood trees. You can get them made from blends of different wood, or single woods like hickory, apple etc. You want to make sure you don't use the ones made for heating as they can be made from softwoods, or sawdust made from treated lumber which can contain chemicals you wouldn't want getting into your food. Pellet grills provide good temperature management, and very nice smoke ring, and will run for hours without needing to be attended to. Perfect for the long smoke time low temperature cooking which results in the best BBQ.