It seems the norm for compilation albums to receive criticism from fans of bands who instantly cast doubt on the credentials of a non-chronological release (i.e. one containing demos, covers, remixes and unreleased materials). In my opinion, this one however is a standalone collection of fantastic unreleased songs, enthralling acoustic versions and some very clever cover versions that will quickly become your favourites over the originals.
If you don't buy any of that, buy this album purely for the first track. The Haunting (supposedly the first song ever penned by Anberlin - don't quote me on that, but I think its right) is a spine-tingling, heartfelt affair with stunningly beautiful lyrics and a captivating melody that builds and builds in drama and volume to heights only reached on some of Anberlin's very best songs on the renowned Citied and Never Take Friendship Personal.
As a fan of the band it is easy for me to say "buy this album its a great collection blah blah blah" but in my opinion you really have to applaud a band that puts so much effort into releasing what is essentially a filler album in the grand scheme of their musical journey. Great band, genuine artists, another collection of superb work.