Sproutman's turn dial is just a quick reference sprout chart that I maintain in the kitchen and not a bunch of books. Easy to use and refer too, as well small enough to take with me when I need too. The sprout times on the chart all seem to be accurate. Lists 25 varieties of sprouts. More than you need. Lists the variety of sprouts, use, taste, seed amount to soak, ready in # of days, method, and skill level. Also has a list of types of sprouters as well as a quick synopsis of how to grow sprouts. A handy tool to have if you want to sprout. Worth the purchase. Recommend.