You can see what's coming from a mile off. Still good though.
I'm pretty sure I've watched 'The Proposal' before many, many years ago as I semi recognised a couple of scenes and knew where the story was going from basically pressing play, though the second half of the film didn't feel like something I had previously seen... so who knows! Either way, that didn't affect my enjoyment at all.
Having only seen Ryan Reynolds in his present day comedy machine it is so odd seeing him act less jokey and more serious, even if you can still spot the quintessential Reynolds comedic delivery in there every now and then. It takes a little bit to get over that but eventually a strong performance is clearly visible. Sandra Bullock fits this realm comfortably and is also very good throughout.
The film does a neat job at making it all believable, the journey from where the two characters begin to where they finish is one that somehow feels natural. It never feels disjointed, which is actually impressive given the plot. Reynolds and Bullock, who share sizeable chemistry, are a large reason for that, of course.