Misfits is a clever dark comedy, about a bunch of young offenders on community service who are struck by lightning and implausibly develop super-powers. The outcome is a series of exaggerated teenage embarrassments - being ugly, being attractive, being lonely, being needy, being ignored. There aren't any SF 'jokes' like in Red Dwarf or something; the verbal humour arises because our protagonists aren't stupid, but neither are they very reflective. In typical teenage manner they say what they see: 'Oh man, his head fell off!', 'You made yourself look like a dick!' etc.
Having young and impoverished protagonists is great for the plot - working class teenagers don't have power, and they are treated like shit, and they do have to fend for themselves - so there is plenty of scope for beings with superpowers to struggle nevertheless with peril and misery.
On the negative side, the acting is no better than so-so. It's not awful, but the actors are inexperienced. I don't mean to gripe though: good luck to them. And the other negative aspect is that the characters are still developing some of the basic ideas about life that you or I might take for granted, and that can be touching or annoying. Mostly touching I think.