This method works for me about 60% of the time, and my chocolate is only semi-tempered (meaning it doesn't have a great snap or sheen, but it does stabilize at room temperature), but it works great if I'm only dipping something for fun. I definitely use a more scientific and professional method (including adding cocoa butter) that always works when selling my holiday chocolates. That being said, I only use the professional method when I melt 2 or more pounds of chocolate. Otherwise it doesn't really keep the temperature long enough to properly temper.