Reviews like this one from Louise Keller are typical:
It's contrived and predictable, formulaic and derivative, yet The Proposal has its own charm. Star charisma is part of it, but there's an interesting dynamic between the two leads. The set up is fun, too.The only thing that really sticks out in my memory from the trailer is when Ryan Reynolds must suddenly jump into bed with Sandra Bullock and she, a woman in her 40s, seems utterly shocked not only by his morning erection but by the very existence of erections in the first place.
Not holding out much hope.