Pollini's is easily the best interpretation of these sonatas I've ever heard. The standard take on these works is that they don't really have a coherent structure or traditional sense of development, and that Chopin just threw a bunch of brilliant but nevertheless disparate pieces together. In Pollini's hands the sustained unity of both is never in doubt. The "Funeral March" Sonata is miraculous. The first two movements have a wild, almost insane abandon about them, which make the hushed atmosphere of the slow movement even more menacing and intense. It's what I'd somewhat melodramatically call a dance of death in four movements. To be both manic and superbly controlled with one's playing seems a contradiction in terms, but believe me, Pollini does it. The third sonata is virtually unknown, but it is a lot like Chopin's other late work (the Bacarolle, the fourth Ballade) with its introspective, serene and meditative qualities. Although it's completely different in mood and tone from the other sonata, Pollini again is equal to the task. Pollini's Chopin is unique, and his rendition of the more intellectual works like the Etudes and the Preludes is second to none. Now he's shown what he can do with another dimension of Chopin, and to truly appreciate these sonatas, it's essential to listen to what he achieves here.