This is very dumb sometimes but very entertaining.
I'd only give this 2.5 stars for being a middle-of-the-road adventure story or middle-of-the-road rom-com. But it's got some magic. Several of the gags are GREAT! The leads are really great. Brad Pitt's bit is great. The craft is great. As a date movie, it's great!
Does it do anything new? No. Will it be easily forgotten? Yes. Is the screenplay well thought out? Absolutely not. Are any of the weak parts so weak they actually take you out of the fun ride? Not really.