Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A unique and very classy yet often-overlooked singer.

Alex D'Castro is a very unique singer (he posesses the vocal purity of a classical tenor with the salsa sonero's improvisations and the bolero singer's romanticism). This was one of his best albums and has sensual yet heartfelt salsa romantica numbers and a few boleros. Alex deserves better and this CD should convince you of his talent.