A light, witty mix of the dry and zany, not for everybody's tastes, probably not even for most. A refreshing change from most films with a mix of subtle jokes, crude swearing, inside references and practical comedy. Supported by a cast of characters that should be instantly recognized by any follower of British comedy in recent years with actors from The Office, Black Books, Little Britain and of course Spaced. For me, a true gem to be treasured for years, I'd happily go see it agian and again.
Of course it probably comes down to "have you seen Spaced?" which I take it you haven't because most who've seen Spaced wouldn't ask about it, even though it isn't really like Spaced.
It's different, if you have the spare cash then I'd say go and see it, you might hate it, you might love it, but chances are it'll be different from most films you've seen. Just hope that most people in the audience are 18 or over, hope to god that there aren't any kids there to go "ewww" because although it won't ruin it, it wont be nearly as good.