I have listened though this now a couple of times, and I must say I am very satisfied on a whole, and I have a feeling this recording will grow with more listens, kinda like Zinman, it takes more listens for the peformance to reveal its secrets. The sound quality is as John described, just as good his M7 (but slightly more distanced). The lower brass is captured very well, and is one the reasons I like to return to this recording.
The interpretation is straightforward, but this works for the "rustic" details that are all over this performance, the instrumental color is very clear. I used the word "rustic" to suggest the rough and tumble quality I am hearing. The orchestra is obviously not VPO, or BPO, but the dedication and execution are "good enough" (as Barry said of Schwarz's M7 with the same orchestra). The orchestra's playing is what draws into this recording the most...the character of the whole is very engaging.
Schwartz shoots straight though many sections without hesitation or romantic idleness, but there are subtle tempo shifts that really highlight important passages, or shape the musical line in a wonderful illuminating fullness. This quality is heard in a ravising way in the andante. but again, the tempo shifts are subtle, so very easy to miss. Thanks to the cowbells and strings, the climax of this movement becomes the highlight of the whole performance...probably among the best cowbell sounds of any M6 I've yet heard. I have to mention again the wonderful presence of the lower brass, woodwind and strings (much like Zinman here).
All in all, Zinman is still my top choice for modern recordings, but this Schwarz is a great alternative, since it is a faster M6 than Zinman, and Schwarz has some wonderful ideas in terms of tempo...although his is a faster straightforward interpretation, there is a sense of wieght and drama...doesn't sound light at all.
Of what I've heard so far, I really like Schwarz's Mahler cycle, none are first choices, but the details in each performance make them very recommendable...the only drawback being his M9 unfortunately.
--Todd