The music of Nicole Dollanganger is unrelenting in the most hushed and reserved ways, making an undeniable mark on the listener. Observatory Mansions showcases a matured understanding of vocal harmonies, utilizing the faint and wispy voice in a way that it had only shown the potential for in previous releases. Building off of the simple and beautiful song structures of previous albums, Observatory Mansions progresses the use of samples, synth and sensibilities that make Nicole Dollanganger unlike any other.