It's a shame the comparisons are there due to similar plotlines but it's a far far superior film to Liar Liar, it's got the quirkiness and dialogue of Spotless Mind mixed with the humour of Me Myself and Irene, I laughed a lot more than I expected. I highly recommend this film, funniest Romcom I have probably ever seen.
I'm going to escape, come back, wipe this place off the face of the Earth, obliterate it and you with it.