My reaction was the same and it's my favourite album of the year, along Taeyeon's INVU!!!
I listened to the mini as I walked to work in the morning and even though I couldn't hear everything properly due to the street noise, I kept saying OMG every 10 seconds
Every song is absolutely fantastic! Very often I like the bsides more than the title track, but here every single song is great.
My favourites now are Brave and Gone, I think, but I've got to listen more!