I'm not a very big Beyonce fan so I usually don't like every single song on her albums, but I love I Was Here, End of Time, and Countdown. They are different without trying too hard. IWH at the beginning reminds of the music from The Social Network, which i think was a really great choice.
I hope this early leak doesn't screw her for sales, but I feel she may have a record low here due to how poorly her new material is being received (compared to how it has been received in the past) and the album's leak 20 DAYS before it is released. Hopefully her next singles do better and her album sales reflect in that.