Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Four great pieces!

Although I have a hard time sometimes with Joan Tower's knotty, uncompromising chamber music, these four concertos are very, very enjoyable - without any dumbing down at all. The Violin Concerto is especially wonderful - convincing, concise, rhythmically exciting, melodically and harmonically arresting and orchestrationally vivid. This is a modern violin concerto that can hold its own right up there with Barber, Shostakovich and Stravinsky.The other concertos likewise also combine music of great concision, drive and drama with moments of great serenity, beautifully drawn-out melodies and delicate construction. The result is music that grabs the ear of the listener the first time around and every susequent time.