It's been mentioned over here:
http://www.organissimo.org/forum/index.php?showtopic=38875
I shall have to get this, but I still also need the other classic BoB albums, first... and there are a couple of other live discs available (Bremen To Bridgewater, and I think one more, also the Harry Miller Isipingo one)
Eclipse at Dawn is better than either Travelling Somewhere or Bremen to Bridgewater, IMO. Don't worry about "first" - it's better to start with something unequivocally good. I can say that, for a fact, the Berlin Jazztage performance is the finest BoB live recording I've heard. That goes not only for fidelity, but the quality of musical statements contained therein. I cannot recommend this disc highly enough - it is unreal.