Where most people would say that this game is a great puzzle experiance. Some rivaling Portal and the like, I'd personally say it takes that concept, but goes a step further. Where in Portal, you are given your full toolkit quite early on and told to solve this and have fun. Antichamber presents you with puzzles that you won't be able to solve your first time around.
That being said. It makes exploration and backtracking quite fun. Just to see which areas you can get to that you couldn't before. Also, For those who wish to know what it feels like to be trapped in a Tesseract (4D Cube). This game I feel gives you that experiance quite well. There were many moments where I was wandering around, thinking I was making progress. Only to realise that I was going in a circle.
Do I reccomend this game. Yes, but only if you enjoy scratching your head, trying to figure out how to get over a gap you can't use your tools too. If that's not your thing. Then I suggest stay away.
So just as a fair warning. If you easily get frustrated and are impatiant. This game is not for you.

For my personal score. I give this game 4½ Flaming Fox heads out of 5.
It doesn't get a perfect Score. But only because It's less a game, and more abstract Art. And I feel that the $20 USD. Price tag is a bit high for it. Maybe when it's on Sale it'd be a 5 out of 5. But if you wanted to experiance art for $20 USD. You'd be better off going to a Museum.