Instruct: Classify Amazon reviews into positive or negative sentiment
Query: String Quartets by a Modern Master

I wasn't aware that Easley Blackwood had written string quartets until Amazon advertised these.Blackwood again proves his mastery of theme, harmony, and counterpoint.These quartets are well worth enjoying for the connoisseur of modern classical music.I would observe that Blackwood's music was less unique when he composed in the more modern idioms, and was far superior when he went back to more traditional forms of composition.