"The Fantasiestücke op. 12 are a good example of this homogeneity. He finds just the right mood for each piece (iridescent for Des Abends, open and frank for Aufschwung, streaky for Traumes Wirren..), but their juxtaposition creates a remarkably well balanced ensemble, which is in no way spoilt by the inclusion of the superabundant Feurigst at the end. In the thorny Humoreske, constantly changing between exterior influences and interior voices, Collins speaks without chattering, sings when he should sing, asks all the right questions, gives all the right answers - in short, the success is total."
Etienne Moreau, Diapason magazine, France, October 2006