Really enjoyed this. Had heard some pretty average reviews on it, but always thought it seemed like it would be quite funny, so went ahead and bought it anyhow.
Story is pretty much dorky guy Kirk, (Jay Barachel), somehow scores hot chick Molly. (Alice Eve) and then shows how his family and friends can't believe his luck, so ultimately nor can he and blows it. No real surprises on how it ends and it is romantic, but has enough gross out humour and guy stuff that you can probably sit your other half through it without too many grizzles.
There is a really good cast in this too. Alice Eve is lovely and reminded me of a younger Reese Witherspooon. Debra Jo Rupp as Kirk's mum, (although she is underused here - she is so funny it would have been nice to see more of her), Lindsay Sloane as his ex, Marnie - amazing how such a pretty girl looked so skanky all through this! His friends played by Mike Vogel, T J Miller and Nate Torrence all work really well too, plus Krysten Ritter as Molly's bitchy best friend.
Definitely one of the better films in this genre.