I got hooked on Grilling Salmon on the planks about a month ago and have done it at least 4 times so far. After grilling on Alder since Cedar was sold out at the local store I decided to get these on Amazon but they don't compare to the others I've used. I've been getting "Fire & Flavor" brand that's sold at my local store and these Nature's Cuisine planks are thinner. Even worse the Nature's Cuisine are rough with wood fibers on both sides (even after wiping them off) - to the point where it got in the food a bit. I don't know if I got a bad batch or not, but I can tell you that the "Fire & Flavor" always have one side smoothed out and even their 'rough' side is still smoother than the surface of these Nature's cuisine.
Fwiw, after a number of side by sides, my wife and I both agree that we enjoy the Salmon grilled on the Alder over the cedar.