Good thriller. Fun to watch !

Rating: 7/10 (8 February 2018)

This is a spoiler-free review.
I'll be honest, as good as it looked in the trailers, my expectations were shaky ever since M. Night ruined "Avatar : The last Airbender", but my worries were blown out of the water with this movie.
I'm not going to say it's perfect, this movie has it's flaws and plot holes like any other, but it was an amusing, and enjoyable, experience.
The story is set up in a somewhat cliché way, but the rest of the movie is so well casted and well written that the little things can be overlooked, à la suspension of disbelief. As for the signature "M. Night Shyamalan Twist" at the very end of the movie, I won't spoil it, but I will say it's worth every second you spend thinking about it's theories and implications.
James McAvoy plays his part with a lot of finesse, nailing the humour and the zany aspect of his character right on. The way that he can essentially play five different characters in the same movie is mind-blowing, but sometimes it's a bit jarring and awkward, but that might just lie in the humour of the movie, which I liked.
I did have an issue with the constant stoic look of our main protagonist, but that's explained through a backstory which, overall, kinda makes sense.
The Fictional element of this movie about the body chemistry changing thing was interesting, and since we never witnessed it really "happen", it keeps you in the dark to the "Monster", capitalizing off of our inherent fear of the unknown.
Yes. There are jumpscares. That's cheap scares. Moving on.
The secondary protagonists are forgettable, so it's hard to really get invested in them, unlike our main protagonist, who's backstory is well-weaved through the movie, as well as holds plot importance.
effects were good, as well as cinematography, capitalizing off of dark corridors with well done lighting during the final scenes to hide the "Final Form" of our antagonist, which, again, capitalizes off our fear of the unknown to the very end.
Overall, great movie. Fun to watch. Definitely would recommend to people trying to ease into the horror genre, because it's not the scariest thing out there.