• Bundesamt für Zivilluftfahrt: “Knowledgeable, and methodologically perfect.”
• CMS von Erlach Partners: “… an excellent teacher of English for lawyers.”
• Europa Institut course participant: “detailed guidance … very practical.”
• Homburger: “… feedback on your classes is excellent.”  
• Schellenberg Wittmer: “ … the judicious mix of grammar, speaking practice and written work is proving to be highly effective.”
• Wenger & Vieli: “[We] appreciate your commitment …”
• ZHAW School of Management and Law: “Dr Wiebalck’s experience and professionalism made her an excellent choice for our legal English course.“