Le nozze di Figaro (Mozart)

The friendly face and the slim silhouette of the Dutch soprano Julia Westendorp make her particularly suited for soubrette roles. Her trough and trough charming and energetic voice, supported by a clear diction and a well balanced vibrato, is the material for a sovereign Susanna., Emmanuel Andrieu
With a fruity strong and agile voice, Julia Westendorp portrays a sympathetic Susanna.
Concertonet, Sébastien Foucart
The beautiful and talented Susanna (Julia Westendorp)
Affari Italiani,

Die Zauberflöte (Mozart)

The applause was first and for all meant for the artists (...) young and promising soprano Julia Westendorp in the role of Pamina...
Opernwelt, Hartmut Regitz
Julia Westendorp (beautiful voice, pretty face) has the timbre and stature of Pamina.
Concertonet, Sébastien Foucart

Armide (Gluck)

Karin Strobos and Julia Westendorp show also vocally their vivacious spirits.
Volkskrant, B. Luttmer
In the smaller parts we heard convincing Dutch singers such as Karin Strobos, Henk Neven and Julia Westendorp.
Trouw, Peter van der Lint
The smaller parts were cast extremely luxuriously, with Henk Neven, Karin Strobos, Julia Westendorp, Diana Montague and Ana the top of their game
Cultureel Persbureau, Henri Drost

Stabat Mater (Pergolesi)

Because of the replacement with soprano Julia Westendorp one could unexpectedly enjoy a singer well educated in baroque singing, with a cristal clear and well timbred voice
Neue Zürcher Zeitung, Alfred Zimmerlin

L'Amour des trois oranges (Prokofiev)

The Princesses of Orange were each remarkable. Soprano Julia Westendorp presented herself well as Nicolette...
bachtrack, Joanna Marsden

L'isola disabitata (Haydn)

...excellent singing by soprano Julia Westendorp...
NRC Handelsblad, Jochem Valkenburg
...Julia Westendorp comes forth as a little female Tarzan, running across the island while at the same time managing to sing genuinely beautifully.
Stentor Deventer Dagblad, Maarten Mestrom
...The vocal achievements and physical agility of soprano Julia Westendorp top everything...
Den Haag Centraal, Aad van der Ven
Of the love couples, Enrico (Martijn Cornet) and Silvia (Julia Westendorp) convinced me the most. Very skillfully, Westendorp portrayed a naive young girl, clearly brought up in the wilderness. She amazed with agile dance and acting skills. (...) The soprano also accounted for most of the humouristic scenes. Moreover, she had brought her clear and delightful voice from the Schöpfungsmesse with her into the opera.
Operamagazine, Jordi Kooiman
...exceedingly strong singing and acting, especially by the two sisters (Judith Gennrich and Julia Westendorp)..., Henri Drost

Dialogues des Carmélites (Poulenc)

The role of the unshakeably calm new prioress Mme Lidoine calls for a dramatic soprano and is being sung by Julia Westendorp. Movingly and with admirable purity she sings her aria at the end before the finale., Mark Duijnstee

Gloria (Poulenc)

Julia Westendorp, singing purely and beautifully, captured the hearts of the audience.
Eindhovens dagblad, Cornélie Hoendervanger