I just finished AntiChamber. I liked it.
It will mess with your head, a lot. A few of the puzzles require careful timing (ugh), and one puzzle towards the end was not obvious at all, but on the whole I liked the way it played merry hell with your sense of space.
I did feel slightly nauseous early on, but got over it. Nowhere near as bad as Descent.
Do NOT play this while reading House of Leaves. Just don’t.