It's not a hateful or forgettable movie, but it's far from being lively or happy.
Despite its weaknesses, I confess I liked this film, and that maybe comes from the fact that it touched me personally. Being a film that is so focused on the pain of losing someone dear, on how a person faces situations of suffering and manages to digest it, it was a film that cost me a little to watch because I also lost a very dear person recently. I expected a more cheerful film with a more lively tone. That, yes, partially frustrated my expectations, and I believe that other people will also say the same. However, I cannot say that I hated what I saw.
In fact, the script focuses on a young teenager who has to live his day-to-day life, at school and at home, while mentally and psychologically preparing himself for the imminent orphanhood, as his mother is very ill and, we know it, will die soon. And in the midst of all this, he ends up imagining, in a very realistic way, a big monster that comes to visit him and that forces him to deal with the feelings he is feeling, and to deal with situations, and also with a grandmother with who has relationship problems.
Directed by J.A. Bayona is a relatively average film. The script is predictable, the "monster-tree" is something we've seen in other films, but it's always a good idea, especially if it's supposed to be a wise and ancient monster, as is the case here. Lewis MacDougall is the young man who will have the lead role in the film, and he does it quite well, even though the script is not very demanding on him. I also enjoyed Felicity Jones' performance, even though the actress doesn't really have much to do. And I feel sorry for Sigourney Weaver, because she's a good actress in the wrong role. It was a massive casting error, and it would have been preferable to cast a genuinely British actress in the role, rather than an American with a notoriously faked accent.
Technically, the highlight obviously goes to the CGI, which is good enough and does an interesting job, especially in the scenes where the tree “awakens” to move and reveal its real appearance. I also liked the soundtrack, even if it's not the most memorable or interesting, and the cinematography, which does its job flawlessly. Liam Neeson was, once again, responsible for the voice of the monster. The actor is already a veteran of dubbing and has given voice to many fantastic characters in other films, so it was a sure bet for the production.