I really enjoy both Jason Segel and Emily Blunt. Their chemistry in this movie didn't seem forced whatsoever. Their comedy providing best friends were also awesome. I love them both from their work on Community and Parks & Recreation. The laughs were great. The story was well told and entertaining. There is a definite hook that makes you care about both characters and understand what they are going through. The only problem with this movie - and it's unfortunately a big on - is that the movie is waaaaaaaaaaaaaaaaay too long and you absolutely feel it. If they could have cut this down to about 90 minutes or paced it a little better, I probably would have loved it.
I would still recommend people checking this out. Like I said, I really enjoyed the story and characters but I felt like I was sitting there for the full five years. Although, as I say that - does that mean that they did a really god job of making you take the journey with the two characters? Mmmmmmm . . . . . interesting.