A friend of mine has the molds and the Slater Stones are turning out good for him. After the first couple he learned the process and now he does really good with them. He made a set of them for me and they turned out well, except for one in which the mold kind of pulled apart some when it was curing. That stone ended up with a bit of a ridge left around it, but it sanded down half-way decent so it didn't bother me too much (plus the price was right). The molds are a good investment.