I kinda like them - I know I shouldn't (at least not the UK version which isn't as good as the American original - probably due to some scary additives that aren't allowed by the EU).
They're really sweet and sickly, and way over priced but they're not like other doughnuts. What I really wish is that Tesco didn't stop doing the 'heart attack' doughnut, that was awesome (chocolate filled, chocolate iced, straight rather than round - used to be made in their fresh bakery section).