as for taste , when Consumer reports magazine compared coffee from mega-chain Starbucks , McDonald , Burger King , Dunkin's Donut , a surprising winner emerged. While the tasters found starbucks coffee to be burnt , they also reported that McDonald coffee beat the rest . It was decent and moderately strong . Although it lacked the subtle top notes needed to make it rise and shine , it had no flaws . The nickname " char-buck " may be well earned , according to some consumer , but others contend that people have different tastes and coffee is a matter of taste.