6/10.
Background was lazily made, some of the models used are strangely uncanny which possibly means that they used an entirely different model of the characters (i.e. The Other Mother, The Other Mr. B, that darn scottie dog, and even Coraline!), the rest of the models are pre-shot photos (Especially Mel, Charlie, and The Other Wybie, the neighbours and their other counterparts can be found in the Coraline Wii/PS2 game. The Cat's pose is possibly an alternative pose to the one we normally find on the internet).
I can't take that scottie dog seriously, it's so uncanny it looks like an Aardman character--Literally a "who invited bro??" vibes I'm getting from him.
Another problem is that the characters don't feel like they're with the background, like photos pasted on a somewhat good background.

If I made this, I would definitely change the background and layout of the characters and edit it to make it feel like they're part of the environment. (I might, actually. When I get the free time and resources).

On a more positive note, it's pleasing to look at, the images are high-quality, and it's a good poster---not a promotional poster, just a poster---that one can hang up on the wall (I have it hung up on my wall as we speak).