Isoamyl Angelate is valued for its ability add warmth/intrigue/dimension to floral, citrus, and herbal blends. It integrates particularly well with white florals and chypres but also traditional herbs like sage (both clary and dalmatian); lavender and fougere things, citruses (especially woody and herbal-leaning eg. bergamot)
 
According to the manufacturer, Militz, “Isoamyl Angelate...is an essential component in the natural Roman camomile oil" -- they're right (it's about 20% of the natural)
 
Odor: Warm herbaceous, floral, fruity, wine-like, ethereal, fresh.