No, that's not necessary, of course. But that does still not mean that it is a really well-made Best-Of Collection incl. DVD with live performances at a tremendous price. Basically, therefore, a perfect package for someone not all of Led Zeppelin will have in his collection. It was clear the group rather an "albums band" and for really interested also no problem with all 8 (+ "Coda" for completists) zuzulegen, but a casual listener will probably already have problems, for example, "Physical Graffiti" completely to listen or the last two plates and to find really good. Combined with the DVD, the choice of the title of "Mothership" almost ideal - it of course (I enumeration saving me) still always missing a few important titles. And that's nothing new / unreleased / rare case (also on DVD), but can be seen more positively. So really no one is "forced" to buy the set. Certain incentives are of course already exist (who also served with me): On the other sound (whether is better or worse time to be seen), great cover and the successful "highlight-selection" of the double-DVD beautifully compact in just 120 minutes.