Brooklyn is a really haunting show. I just found it entertaining initially, but the more I thought about it, the more I liked it. I can see how some people would have trouble with it--it takes a lot of suspension of disbelief, and it's very stylized (that's what I think the book is, stylized, not a piece of crap). They call it a fairy tale and tell it in the fashion of one. I think fairy tales tend to sound cliche, and in the effort to make it sound like one, the writers wrote in that style. So yes, it is filled with cliches, and no, it is not believable--but it does have a message, one which I think is very powerful if one can manage to suspend disbelief long enough.
"A little humility wouldn't hurt."
--Ellie, Constantine-Hellblazer, "Dangerous Habits"