Likable Jerry (Ryan Reynolds) stumbles innocently into the role of a killer, guided along the way by his evil talking cat and benevolent talking dog.
Reading other reviews, you will find words like "genre-bending" or "a mess", and indeed, the film is a bit uneven. The tone shifts a bit here and there, though it really is not all that bothersome and others seem to complain too loud.
Although Gemma Arterton has been great in the past, she just does not make the character of Fiona even remotely likable. She is supposed to be the love interest of Jerry, but there is just nothing about her that suggests chemistry. Anna Kendrick, on the other hand, is excellent, and it is great to see that she has been maintaining a high profile after "Up In The Air". She might have been the only actor to escape "Twilight" unscathed.
Reynolds should be praised for his range of voices (the cat sounds like Craig Ferguson and the dog sounds like Gary Busey). This could have been a weak point, but he instead elevates it to the next level. He also has the right personality to take a story that seems to combine the Son of Sam and "Master and Margarita" and make it fun.
If nothing else, there is a Chinese Elvis, and this may be the only movie able to claim that.