Many articles and reviews that I have read over the years have lauded this CD and now you can obtain Walter's Mahler 1 & 2 at budget price remastered in excellent early stereo.
Experts elsewhere are better qualified than me to comment as to why these performances are soo good in comparison with so many others on the market; all I can say is that these are magical recordings conducted by Walter who, of course, knew Mahler and worked with him towards the end of the composers life. This fact does not necessarily mean that the performances are authoratitive (there are many other great Mahler 1 and 2 recordings) but there is an inevitable knowledge about Mahler's intentions, I guess.
Mahler 2 ("Resurrection") is split over the two discs but this is of no importance and you also get Lieder eines fahrenden Gesellen sung by Mildred Miller too.
An excellent purchase of this monumental music to go with others like Klemperer, for example.