This is an utterly enthralling version of Schoenberg's Gurre-Lieder directed by the Stravinsky expert Robert Craft.
We have great singing on this re-release from Koch recorded in 2001. The production values are, simply, stunning. Huge dynamic range, deep bass, and clarity and I'm no hi-fi anorak!
Some people say that Schoenberg is too difficult for "the masses"; I think that that is utter garbage and almost everyone who enjoys notated music could enjoy this work.
The 2CD set is accompanied by Naxos' usual helpful booklet but you have to download the libretti and I hear that this is in German only.
If you are curious about Arnold Schoenberg, this is an inxepensive toe in the water.