I went to see it last week, I wasn't overly impressed. The plot was poor and the comedy, although it had its moments, was somewhat lacking for me.
It felt as if the actors were left to adlib a lot which for me felt like they (especially McCarthy)overcompensated just to force out something funny - so in the end it felt like 1 out of 10 moments were actually funny.
I am not saying I sat there stoney-faced there were a few laugh out loud moments but really not enough for a comedy.
So if the comedy was written then they need to higher better writers and if the comedy was mostly adlibbed then I personally feel they went with the wrong actress.