I watched exactly one review before buying Superliminal and though I agree with that review to a point (that the puzzles can be repetitive) it seems that the style of puzzle changes right when you've learned a new trick in the game.
In terms of puzzle games, if you like portal, you'll like subliminal too. There was an entire "horror" section that can I hated but I don't like horror much at all. The game is about dreams so it's not horror so much as it's hints of whatever you imagination wants to make up... with blood on the floor.
I do think the end message of the game is SUPER positive. I wasn't ready for some really great life advice but the game delivered it in a really great way. I was surprised by that.
Overall, if you like puzzle games, 11 out of 10 would recommend.