"In this version of the Etudes symphoniques (in which he incorporates the posthumous variations) he shows himself to be a very rare artist in that the fearsome technical difficulties are surmounted seemingly without effort, at the same time as the poetic nature of his interpretations place him in the highest class, alongside Perahia and Kempff. Where Collins scores so admirably is that his combination of those elements are placed wholly within a profound understanding of the underlying structural mastery of the studies - a demonstration of the Celto-Germanic revelation. At times, it would be hard to imagine more sensitive pianism (such as the posthumous Variation IV) or more controlled virtuosity (as in the succeeding Variation VI, Allegro molto) or more technical-expressive virtuosity (as in the ninth Etude). This is deeply impressive playing throughout."
Robert Matthew-Walker, International Record Review, June 2009