The review of Oopus' album 'Reivlender' reflects on the band's live performance at the Viljandi Folk Music Festival, where intense whipping was a key part of a serious ritual rather than a joke. This ritualistic vibe permeates the album, which is described as reminiscent of sauna ritual music, suggesting a connection to ancient traditions and healing practices. In the context of the album, Oopus delivers an immersive experience through a combination of atmospheric sounds, synthesizers, and a strong sound system.

The reviewer highlights how 'Reivlender' creates a unique auditory space best enjoyed as a journey rather than individual tracks, with the first three pieces blending seamlessly into what could be considered a longer composition. The album is noted for its clean and polished sound, alongside beautiful vocals and professional production. However, the review mentions that, despite the album's overall effectiveness, it tends to feel somewhat too orderly, missing opportunities for surprises and unique twists that could have added more character to the listening experience.

Overall, the review presents 'Reivlender' as an artful yet precise collection of tracks that evokes the essence of traditional rituals while engaging with modern music production techniques. It emphasizes both the strength of the music in creating a ritualistic atmosphere and the desire for more spontaneity in its execution, making it a thought-provoking listening experience for fans of the genre.