The GF and I thought this movie was the best yet from the Apatow bunch. For us, it was very true to life in the every relationships have its give and take. We have also argued over some of the same things that are at the basis of Peter and Sarah' s relationship.
I would recommend it for any couple, singles or married people out there.
P.S. It is really scary that I do many of the same things as Peter without all the crying.