Time Out says

For those that like their vocal experiment undiluted, Greek-American Galas is the swooping, groaning, screaming genuinely revolutionary and remarkable, opera-trained article. Tonight she performs Ferdinand Freiligrath’s devotional ‘Der Stunde Kommt’ (‘The Hour Will Come’), Marlene Dietrich’s favorite text and, in Galas’s hands, a sentimentally melancholy tune that inspires her to thrilling/terrifying heights.

Source: Time Out London