I write this review from Italy, where the movie was released on November 7th.
I was pretty curious to check it out for all the various reasons many others had already expressed.
And once I ended watching it all I could think was ... Finally They Made It!
Finally they realized a REAL movie in which these characters can show all of their crazy traits in the more genuine way.
The result is a great balance between this more Classic aura (in more senses than you could think) and the more Modern setting.
First of All, the thing I'm sure everyone will agree on: it was so satisfying seeing 2D being used again in a large production, and in a so fluid way that perfectly serves the characters' expressiveness and dynamism, and all of the settings' dimensions.
And speaking of characters, I appreciated the idea of centering it about Porky and Daffy, they're simply the best duo of the Tunes' lot, even though I have to admit I do prefer the Chuck Jones' version of the duck, the more greedy and egotistical one, rather than the complete lunatic one, but it does serve well his job here, so I can't complain.
Porky is just Porky, but he too does pretty well, and I liked the use of Petunia, she was really entertaining in her on way, and her design was really loveable.
The Alien invader too had his moments, his design is maybe simple but pretty efficient, it clearly pays homage to the classic Sci-Fi movies of the 40's, just like the rest of the movie does.
And the thing about the mind-controlling Gum gives life to some images that managed to be both funny and hideous.
So, all in all, a perfect Looney Tunes plot, that to many though may come out as too simple or void of any originality, and while I do agree that they could've been a bit more ambitious in terms of the plot, and that some of the gags don't really work out, I also think that all in all you should take this as a sincere Love Letter to the characters and their legacy, a good way to introduce them to new audiences, and to remember to old fans that this is N-N-N-Not All Folks, yet!
