Fail. Is this supposed to be a joke? I honestly can't tell if the guy is satirizing the self-indulgent tone of most tutorials. It has constant digressions to useless topics, like Int versus Integer, that just show off the author's erudition.
It's pretty similar to the previous Casting Spels in Lisp tutorial in that it's overly cute and loquacious but does manage to approach a heady topic with some degree of innocence.
It's more targeted as an intro to Haskell for the light hobbyist, really.
It's been pointed out to me that "Fail" is hardly constructive criticism. I'll try to update my blog post (linked below) with something that might actually help.
