Instruct: Classify the given review into positive or negative sentiment.
Query: Saint Etienne - Heart Failed (In The Back Of A Taxi)

On the EP side of Saint Etienne's HEART FAILED (IN THE BACK OF A TAXI), the b-sides contrast nicely with the digital house of the title track. "Thank You" is as fragile as any apology ever was, with its crystalline tones and acoustic guitar, while "Bar Conscience" blends blurting electronic instruments with haunted vocal hums and bass. A more experimental side to Saint Etienne, to be sure.