Assuming you mean the Grande Polonaise Brillante Op.22 (the one which was originally written for piano and orchestra (although, as is typical of Chopin, the orchestral part is completely banal and can be easily removed) preceded by the Andante spianato), I've hammered through it a few times. It is lots of fun, and not quite as difficult as it sounds (though not exactly easy either). Probably one of my favourite lesser known Chopin works, along with the Rondo a la Krakowiak Op.14 and the Bolero Op.19.
Topic: Has anyone ever played......