Saw this last night, and thought it was alright ... but maybe it will need time to grow on me and maybe I don't want to hype it up as I prefer going into a film with low expectations.
I think I remember Extract being dubbed as a blue-collar Office Space, but thought it was anything but that. In OS, you have great attention to the title theme and that's where many people could related to it. In this film, it's much less about the environment through the eyes of assembly workers and much more through the eyes of a man going through a failing marriage.
Aside from one character which I think most will be able to pinpoint immediately, the cast did a great job complementing each other. Should also be obvious that David Koechner stole the show and Mila Kunis looked amazing on camera once again ... like yum yum I need some of that before I die amazing. Ben Affleck, a bartender at a sports bar in the film and Justin Bateman's best friend, was actually amusing and tolerable, albeit some of his character's jokes ran on empty from over-usage (same could be applied to Brad, the male escort who would rather work for sex instead of doing his landscaping job). But with that, Extract has one of the better pot-smoking scenes that I can remember in recent years. Also, there's a Gene Simmons cameo that was done very well ... in fact, I probably could have used more of him on camera.
If I had to give this a star rating, I suppose 2.5/4 would be justifiable. But I'm started to believe that a 2nd or 3rd viewing in the right setting will make it that much enjoyable.