I cannot claim great knowledge of the Schubert song cycles, so I cannot compare these recordings with myriad others and say whether they are better or not so good. All I know is that this is gorgeous music, beautifully sung and played, as only someone with the profound artistry and depth of knowledge of Dietrich Fischer-Dieskau could do. The beauty of the voice is extraordinary. And then there's the sensitive accompaniment by the King of accompanists Gerald Moore.
The fact that these are old recordings (1971) is not in itself a drawback, but to me the recording lacks the crispness and immediacy of a really good recording. Compare the "Winterreise" of Christoph Prégardien/Andreas Staier (the latter on a vintage fortepiano) to see what I mean. Nevertheless, for the price, a musical feast.