These things work, but you may spend a little time finding the right stick and trimming it down. Once you do, it'll last until you strike camp.
Finding the right stick is a bit of an art. You can't use just any dry twig. They won't support much weight, usually aren't straight, and may even catch fire. Save them for kindling. Try to find a straight and skinny limb off a live tree. (Sorry that's not more environmentally friendly.) These tend to be straighter, stronger, and will not ignite unintentionally.
Best of all, there's 4 of them in the box. I overlooked this item on Amazon several times, noting it was too expensive at a dozen dollars. I had inadvertently mistaken 1-pack to mean 1 fork, which typically sells for $3-5 each. Seeing that there were actually 4 in the box, considering the cost of shipping and/or tax at other shops, I immediately jumped at these.
These will serve you well for years as long as you keep them clean.
The only negative is that they aren't that big, so you're somewhat limited as far as what they can cook. Sausages and marshmallows are fine. You may even manage a steak with 2 forks, but will produce tough dry meat. No burgers. You can grill fish if they're small enough. It helps if you stick the fork inside the cleaned belly for more support. You may be able to manage some veggies like corn or zucchini, but remember to poke a few extra holes for steam to escape or you may get squirted with hot zucchini juice. Perhaps Japanese eggplant (What are you doing out in the woods with Japanese eggplant??). You get the idea. Slightly longer tines would have made this tool more practical, but I still love them as-is.