Alone for the recording of Sokolov's "Art of Fugue" (which is also available separately) is worth the purchase of this collection. A wonderfully transparent sound, brilliant game with a lot of feeling, but the over-interpreted at any point - for me a real reference.
The same applies to the highly sophisticated interpretations of Chopin. The interpretations on the other albums are moving at the highest level.
What a pity that so few recordings of this Ausbahmepianisten are on the market.