It’s a genuinely enjoyable film that I’d happily watch again and suggest to others. I have to say, going in, I assumed this would be another predictable effort from Disney, seemingly trying to push a progressive agenda—so my expectations were quite low. The movie turned out to be surprisingly wonderful and unexpectedly profound. The title suggests it deals with the human soul, so I anticipated something similar to "Inside" or perhaps involving jazz music; while it does incorporate those elements in an appealing way, the exploration of the universe’s inner workings within a sort of transitional space is remarkable. I expect viewers will come up with their own explanations for what the movie signifies on a technical level, but the narrative centers around chasing dreams and happiness alongside experiencing life itself. The animation quality is superb, and all the voice actors are excellent. The story is great, and the characters feel well-developed, complex, and engaging. It’s difficult to imagine anyone genuinely disliking this movie. The plot's framework feels somewhat conventional for something so imaginative, but I suspect that was intentional—to maintain broader appeal and align with typical Disney family film expectations.

Source on TMDB