I love this album! It's much more of a mix compared to Femme Fatale and she's working her vocals the most she has since ITZ. The only thing I'm disappointed with is the fact that we only get 13 songs, there should at least be 12 on the standard edition.
The up-tempos have mostly no structure and her vocals only sound good on Alien, Passenger and Don't Cry. The voice cracks are all over the album. I mean her voice is as good as it was on Circus (Blur, Out From Under, Quicksand, My Baby).. her voice is really nothing special on this album and especially not the best it has ever been. '98-'03 Britney had the strongest voice.