I had really high hopes for this one, but have to admit it fell very flat for me, as well. I was looking at my watch (well, the clock on the cable box, anyway) wondering if it would ever end. I think I see Melissa McCarthy in the same way others see Will Ferrell...meaning, I laugh when Ferrell sneezes, whereas others find him really annoying and unfunny.
In all fairness, this film has received a staggering RT score of 93%, so I'm very firmly seated among the minority. I loved some of the cast (Statham, Jude Law), but unfortunately I just didn't connect with the humor.