the remastering of the first 3 albums is a significant upgrade on pressure, clean frequency response compared to the 90s remasters. CD as well as vinyl editions. but in IV and houses is not really to speak of an improvement. clear it the high and low frequencies were raised again. unfortunately does here not so good, especially in the heights zischelts enormous. the 90s Masters are softer and more pleasant by listening to the ..... The bonus CD contains almost only alternative mixes, with additional guitar or piano missing, or backing tracks (without vocals) No additional titles or alternative versions. even as hardcore Zep fan underwhelming. the luxury boxes, however, are downright outrageous: long-known photos, mostly live, newspaper clippings and reviews, as well Barvo-title pages got lost here. All in all teenie-like level, unfortunate .... nothing to the creation of albums, recording situation in Headley Grange, etc, no engineer information, nothing about the remastering, state of the tapes, whatever, absolutely no info Additional written ... and also not to the creation of the legendary covers of Hipgnosis. ....... everything away completely ..... only bildchen ... hallelujah! the vinyl sounds very good and can with our pressings early 70s almost keep up, as I said, almost. prints the covers, however, are phenomenal. Of course there 5 points for the sensational music, but the design of boxing is so unkind that I almost want to warn against a sale and therefore forgive only sad 3 points ... sorry