Serious Eats - seriouseats.com

Very well done! Cook's Illustrated did a very similar test under scientific testing rules and came to a similar conclusion. This is the last paragragh in their review: What do we recommend? The more expensive chocolates--Scharffen Berger, Callebaut, Ghirardelli, and Valrhona -- were all well liked and received similar scores. If you are willing to buy in bulk by mail, Callebaut turns out to be a best buy. Of the three mass-market brands (Nestle, Baker's, and Hershey's), Nestle received more positive comments and significantly higher scores. In fact, there were so many negative comments about Baker's and Hershey's that we cannot recommend either chocolate. It's important to remember, though, that chocolate, much like coffee, is a matter of personal preference, so consider each brand in order to find a chocolate that suits your palate. The gamut of flavors runs from "nutty" and "cherry" to "smoky," "earthy," and "spicy."