Instruct: Classify a given review into positive or negative sentiment.
Query: A big disappointment

We looked forward to this machine after reading so many glowing reviews. However, it has not lived up to our expectations. There are so many things that have to be JUST right in order to get a good cup of espresso--the right grind of coffee, the right placement of the tamping lever, the water temperature, etc. Only about every fourth try results in good espresso. If you don't put the tamping lever just right, NO coffee comes out at all. That means a lot of wasted coffee!! The instruction booklet is useless to help with any problems. If we hadn't thrown away the box, we would have returned it immediately!!