Very clever and different

I'm surprised by all the negative comments. I enjoyed it and found it well above the typical romcom. The havoc raised by the children was clever and the movie showed the many alternative outcomes efficiently and humorously.

The Rebecca character had the best lines such as her unintended shredding of Chaz. Upon seeing Amanda with Chaz in his mauve suit...
Rebecca: "Oh, have they booked a cabaret act?"
Chaz: "No, I'm Amanda's boyfriend."
Rebecca: "And you're in the cabaret?! That's amazing."
Chaz: "No."
Rebecca: "I didn't know you had a new boyfriend. That's good. I'm so glad you moved on from that last guy you were seeing. What was his name? Chaz? Last time I saw her she was like, 'I'm seeing this dickhead.'"
Chaz: "No, I'm Chaz."
Rebecca: "What?"
Chaz: "I'm Chaz."
Rebecca: "Oh, my god. [long pause] Have you gone out with two Chaz's in a row? This is such a unique name. That's nuts."