Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: both units arrived defective- save your money!

Horrible, low quality product! I purchased this for my child who has difficulty sleeping at night. The first unit we ordered, the nature sounds stopped working completely the same day it was opened. With the second, replacement unit, the radio stopped working the second day we had it. I will not be buying any more machines from this company. They should be embarrassed at the low quality control. Don't let the low price tempt you- save your money and time and purchase elsewhere.