[2] She appeared there as Konstanze in Mozart's Die Entführung aus dem Serail, staged by Calixto Bieito[3] in a provoking way.

She has collaborated with conductors such as Daniel Barenboim, Bertrand de Billy, Marc Minkowski, Antonio Pappano, Philippe Jordan and Vladimir Jurowski, and with stage directors such as Peter Konwitschny, Jonathan Miller and Hans Neuenfels.

[3] Among her roles are characters in operas by Mozart: Elettra in Idomeneo, Fiordiligi in Così fan tutte, Donna Anna in Don Giovanni, and the Countess in Le nozze di Figaro.

[6] Gerard Hoffmann from Vienna said about the Frankfurt performance that Bengtsson is the quintessential Strauss interpreter, credible and expressive, with "perfect diction and graceful acting".

He described her voice as "flexible, warm, rich in colours and nuances, with a slender middle range and splendid piano".