I just quickly took a look at the Fr-speaking forum; they say this is the most slender, thinnest building ever built.
It's got its pack of fans over here for this reason. Concrete is allowing such structural feats.
It's a splendid tower, there's no question about the design itself.
However, they also claim the building would host only some 60 units.
That's insane. The worst is the tower might sit mostly empty most of the time, eventually.
Foreign billionaires purchasing that kind of real estate take it as speculative goods, and hardly ever set foot in there.
Same phenomenon as that of large urban mansions here in Paris, that's quite controversial.