One thing to always do with pellets is read the entire front & back label. You want to make sure what wood is used in the entire pellet, not just for the flavor. Like DaveOmak pointed out, Todd's pellets are made from 100% flavor wood (ie, cherry pellets, are 100% cherry). Some of the brands out there are a mix of flavor wood and other hardwoods, but this should be on the label somewhere. I saw some food grade pellets at Academy Sports one day that were an oak or alder base with flavor wood added. Price was much less than 100% smoke flavor wood pellets, but it's also using a more inexpensive base wood. Sounds like that may be what Hillbilly Jim found at Wallyworld. Now how well do they smoke? I don't know as I have not tried them. May be just fine, but my point is be aware of exactly what you are buying as price alone is not a good indicator. I for one think that in a small pellet tray or tube, it is important to have the flavor wood providing what smoke there is.
Also a side point for those new to using pellets, in the winter months you can find big bags of pellets at HD, Lowes, Walmart, etc..., but those are for pellet burning furnaces & stoves and not food smoking. The wood in those is pretty much never going to be what you want to flavor your food.