Considering (at the time of this review) one gets each disc for less than $2, this has to be one of the best bargains available at Amazon. This 35-disc set contains most of the music of Richard Strauss in mostly classic, knowing performances. True, one doesn't get 'Arabella', 'Capriccio' or 'Intermezzo' but one does get marvelous performances of 'Der Rosenkavalier', 'Ariadne auf Naxos', 'Die Frau ohne Schatten', 'Elektra', 'Salome', and 'Friedenstag' among the operas. There are absolutely first-rate performances (10 CDs!) of the tone poems and other orchestral music by the, for my money, best ever interpreter of them, Rudolf Kempe and the magnificant Dresdener Staatskapelle. There is all the chamber music (more than I realized there was) on 4 CDs, including the concerted horn works with piano accompaniment, excellent four-hand music and solo piano music on 3 CDs, the oddly compelling melodramas (best-known one is 'Enoch Arden') on one CD, choral orchestral music (one CD) conducted by Michel Plasson, Lieder sung by sung by Mitsuko Shirai, another CD of Lieder with Richard Strauss himself accompanying and featuring such singers as Anton Dermota, Hilde Konetzni, Alfred Poell and Maria Reining (all stars of their day -- but in all fairness Konetzni isn't in good voice), and finally, the orchestral songs (including the Four Last Songs) sung rather well by Charlotte Margiano, with orchestra conducted by Edo de Waart. 35 discs in all. That's a lot of Strauss, enough to last a lifetime for sure.
There is also a DVD containing opera synopses and a documentary about Strauss by Stephen Jay-Taylor.
The downside here is that there is no booklet, so no notes and no librettos or song texts. Clearly this set is for those who are willing, if they desire, to look these things up on the Internet where they are readily available with a little digging.
I know I more than got my money's worth.