Nice compact kit, good range of sizes but please understand what it is for. They are designed for low heat dissipation elements, with the largest being 22 x 22, which is less than a square inch. It would be nice if they included a few more of the same size. (only 2 included) They would put this on small chips, I'll put them on consumer market router SoCs and wifi chips first. Raspberry Pi would also be a good candidate, you can cool things like small mosfets, VRMS, Ram, surface mount inductors and the like. You could probably get them individually cheaper, but you'd have to buy more of each size. Case makes it easy to stay organized. They don't have any assembly parts, you need either hot melt tape (don't just use double sided tape) or hot melt adhesive (I recommend tape as it's easier to remove later if needed). Get a kit of tape/glue if you don't already have it, or buy separately. I bought the kit without tape/glue because I already have tape.